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# Discovery of circa 115,000-year-old bone retouchers at Lingjing, Henan, China

Luc Doyon, Zhanyang Li, Hao Li, Francesco D'errico

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Luc Doyon, Zhanyang Li, Hao Li, Francesco D'errico. Discovery of circa 115,000-year-old bone retouchers at Lingjing, Henan, China. PLoS ONE, 2018, 13 (3), pp.e0194318. 10.1371/journal.pone.0194318. hal-02864058

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RESEARCH ARTICLE

# Discovery of circa 115,000-year-old bone retouchers at Lingjing, Henan, China

Luc Doyon¹,²* , Zhanyang Li³,⁴‡, Hao Li⁵,⁶‡, Francesco d'Errico¹,⁷●

1 Centre National de la Recherche Scientifique, UMR 5199 - PACEA, Université de Bordeaux, Pessac CEDEX, France, 2 Département d'anthropologie, Université de Montréal, Montréal, Québec, Canada,

3 Institute of Cultural Heritage, Shandong University, Jinan, Shandong, China, 4 Henan Provincial Institute of Cultural Relics and Archaeology, Zhenzhou, Henan, China, 5 Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, Beijing Municipality, China, 6 CAS Center for Excellence in Life and Paleoenvironment, Beijing, Beijing Municipality, China, 7 SFF Centre for Early Sapiens Behaviour (SapienCE), University of Bergen, Bergen, Hordaland, Norway

● These authors contributed equally to this work.

‡ These authors also contributed equally to this work.

* doyon.luc@gmail.com

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## Abstract

Most Chinese lithic industries dated between 300,000 and 40,000 are characterized by the absence of Levallois debitage, the persistence of core-and-flake knapping, the rarity of pre-pared cores, their reduction with direct hard hammer percussion, and the rarity of retouched flakes. Here we report the discovery of seven bone soft hammers at the early hominin Lingjing site (Xuchang County, Henan) dated to 125,000–105,000. These artefacts represent the first instance of the use of bone as raw material to modify stone tools found at an East Asian early Late Pleistocene site. Three types of soft hammers are identified. The first consists of large bone flakes resulting from butchery of large herbivores that were utilized as such for expedient stone tools retouching or resharpening. The second involved the fracture of weathered bone from medium size herbivores to obtain elongated splinters shaped by percussion into sub-rectangular artefacts. Traces observed on these objects indicate intensive and possibly recurrent utilization, which implies their curation over time. The last consists of antler, occasionally used. Lingjing bone tools complement what we know about archaic hominin cultural adaptations in East Asia and highlight behavioural consistencies that could not be inferred from other cultural proxies. This discovery provides a new dimension to the debate surrounding the existence of the Middle Palaeolithic in the region. The attribution of East Asian sites to the Middle Palaeolithic assumes that cultural traits such as the Levallois method represent evolutionary hallmarks applicable to regions of the world different from those in which they were originally found. Here, we promote an approach that consists in identifying, possibly from different categories of material culture, the original features of each regional cultural trajectory and understanding the behavioural and cognitive implications they may have had for past hominin populations.

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OPEN ACCESS

**Citation:** Doyon L, Li Z, Li H, d'Errico F (2018) Discovery of *circa* 115,000-year-old bone retouchers at Lingjing, Henan, China. PLoS ONE 13 (3): e0194318. https://doi.org/10.1371/journal.pone.0194318

**Editor:** Michael D. Petraglia, Max Planck Institute for the Science of Human History, GERMANY

**Received:** December 20, 2017

**Accepted:** February 28, 2018

**Published:** March 12, 2018

**Copyright:** © 2018 Doyon et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

**Data Availability Statement:** All relevant data are within the paper.

**Funding:** The excavation and scientific research at the Lingjing site is funded by grants from the National Natural Science Foundation of China (41630102, 41672020). Li Hao wishes to thank the Chinese Academy of Sciences for the support granted by the Pioneer Hundred Talents Program. The present study was funded by the Sino-French Cai Yuanpei program (36707NF). This work was partially supported by the Research Council of Norway through its Centre's of Excellence funding
scheme, SFF Centre for Early Sapiens Behaviour
(SapienCE), project number 262618. Luc Doyon
was granted financial support from the Institut
écologie et environnement of the Centre national de
la recherche scientifique (CNRS-InEE). PACEA
(UMR5199 CNRS) is a Partner team of the Labex
LaScArBx-ANR n° ANR-10-LABX-52. The funders
had no role in study design, data collection and
analysis, decision to publish, or preparation of the
manuscript.

**Competing interests:** The authors have declared
that no competing interests exist.

**Introduction**

A key issue for research on the cultural evolution of our genus is when, how, and why prehis-
toric populations ceased to consider bone as a by-product of hunting and carcass processing,
and recognized its technological utility as a suitable raw material for other activities such as
knapping and retouching of stone tools. The use of osseous artefacts in these tasks allows for a
better determination of lithic blanks and retouched tools morphology [1]. Bone fragments
used for knapping and retouching were signalled in the literature since the end of the 19th cen-
tury (for a review, see [2]). Henri-Martin [3] was the first archaeologist to propose that faunal
remains from the Mousterian layers of La Quina, Charente, France, with surfaces bearing pits
and scores were used for the manufacture of lithic artefacts. Subsequently, Semenov [4] inter-
preted microscopic features on bone from Eastern European Middle and Upper Palaeolithic
sites, such as Kiik-Koba and Kostenki, as implements used for knapping stone tools and
inferred laterality from the orientation of the marks. Since then, traces left on bone fragments
by their experimental use as retuchers have been widely described in the scientific literature.
Areas bearing these modifications are covered by “deep, short, sub-parallel, closely clustered
grooves, V-shaped in cross section” [5]. More recent experiments sought to distinguish marks
produced by retouching flint and quartzite blanks [6]. Sub-spherical pits and sinuous scores
with rough internal morphology are characteristic of retuchers used on quartzite; trihedral
pits and rectilinear scores with even internal morphology are typical of flint retouching. On
archaeological specimens, these modifications are present in single or multiple areas, generally
close to the bone ends [7,8].

Bone remains bearing modification interpreted as the result of their use as retuchers and
soft hammers were reported at numerous sites from Europe, the Levant, and Africa. In Africa,
the earliest instance of this behaviour is represented by a soft hammer on a giraffe astragalus
found at Olduvai Gorge, Tanzania, in an occupation level dated between 2.1-1.5 Ma BP [9]. In
the Levant, the first known soft hammer is an antler base from Gesher Benot Ya'aqov dated to
the MIS18 [10]. In Europe, the distal portion of a red deer femur bearing pits due to its use as
hammer is found at Boxgrove and dates back to MIS13 [11].

In Africa, a long-bone shaft fragment from a Class III bovid used as a retoucher was uncov-
ered in a layer attributed to the Still Bay (circa 77-75 ka BP) at Blombos Cave, South Africa
[12]. In Europe, this tool type appears in the archaeological record between the MIS12 and 10
with a number of equid, bovid, and cervid long bone, rib, and vertebra fragments used as bone
retuchers. These specimens were unearthed from Schöningen (MIS12) [13], Terra Amata
[14,15], and Cueva del Angel (MIS11) [14]. From MIS9, bone retuchers become a common
feature of Neanderthal toolkits both in Europe and in the Levant as attested at sites such as
Bolomor Cave [16], Cagny l'Épinette [14], Gran Dolina [17], La Micoque [18], Orgnac 3
[14,15,19], Qesem Cave [16], and Schöningen [20]. This tool type is frequently identified in
Middle and Upper Palaeolithic assemblages (e.g., [6,15,21-29]). A fragment of Neanderthal
skull from the Mousterian site of La Quina, Charente, France [30], and a femur shaft fragment
from Goyet, Belgium [31], were used as retuchers and represent the first instances of the use
of human bones as tools. At present, it is unclear whether or not this technological innovation
occurred in East Asia and, if so, when and where it appeared. The eastern-most Palaeolithic
site that has yielded bone retoucher is Chagyrskaya Cave, Altai Mountains, where this tool was
recently found in Mousterian levels [32] attributed to the end of MIS4 and the onset of MIS3
[33].

In this paper, we describe bone retuchers recovered at the Lingjing site (Xuchang, Henan,
China) in a level dated to circa 125-105 ka BP. These artefacts represent the first evidence
from Eastern Asia for the use of bone as raw material to modify stone tools. This discovery has
implications for the ongoing debate on the nature of Late Pleistocene cultural adaptations in China. The lithic technology that characterizes most Chinese assemblages attributed to this period is interpreted either as reflecting a peculiar facies of the Middle Palaeolithic [34,35] or the persistence of essentially Lower Palaeolithic cultural traditions [36–39]. The Lingjing bone retouchers and the behavioural consistencies their analysis highlights show that in spite of the apparent simplicity of lithic reduction sequences identified at the site [40], Lingjing hominins integrated in their behavioural repertoire the use of bone fragments to shape stone tools. These results corroborate the view that early Late Pleistocene cultural adaptations from China must be understood as reflecting original cultural trajectories whose degree of complexity cannot be evaluated solely through the study of lithic assemblages.

## Archaeological context

The Lingjing site (34° 04′ 08.6″ N, 113° 40′ 47.5″ E, elev. 117 m) is located in Lingjing town, northwest Xuchang County, Henan Province, northern China, about 120 km south of the Yellow River (Fig 1). The site was discovered in 1965 when microblades and microcores [41], as well as mammalian fossils were collected on the surface. It consists of a water-lain deposit owing to the presence of a still active water spring. The site covers an area greater than 10,000 m². Since 2005, a 551-m² area was systematically excavated under the supervision of one of us (LZ), and eleven geological layers were identified for a current depth of *circa* 9 meters. From the top to the bottom, layers 1–4 are Holocene in age, and have yielded material culture associated with a period that spans the Shang-Zhou Bronze Age to the Neolithic. In layer 5,

<figure><img src="image_5.png" /><figcaption>**Fig 1.** a) Location of Lingjing (Henan, China); b) Stratigraphy indicating the geological and cultural layers. Modified from [44]. Reprinted with permission from AAAS.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g001
microblades, microcores, bone artefacts, perforated ostrich eggshells, and ochre as well as faunal remains attest of an occupation of the site between the LGM and the Younger Dryas, a period when pottery first appears in this region [42,43]. In layer 10, a relatively small number of lithic artefacts and faunal remains were discovered. Finally, layer 11 yielded an abundant lithic and faunal assemblage, in association with two incomplete human skulls. These skulls are interpreted as bearing a mosaic of morphological features indicating both regional continuity and interregional population dynamics [44,45]. All other layers (6 to 9) are sterile.

Layer 11 was OSL dated to circa 125-105 ka BP by comparing the results obtained from six different OSL dating methods, including the single aliquot regenerative dose protocol [46]. This age indicates the human occupation of the site occurred during the early phases of MIS5 (MIS5e to MIS5d). Artefacts made of quartz and quartzite dominate the lithic assemblage (>99%), and include cores, flakes, formal tools (i.e., scrapers, notches, denticulates, borers, points, choppers, etc.), and debris. Chert is also marginally represented (<1%). The abundance of debitage and evidence for use wear on lithic artefacts suggests that both the manufacture and use of lithic tools occurred at the site [40].

The faunal assemblage is typical of the late Middle to early Late Pleistocene in China. The most represented species are *Equus caballus*, *Equus hemionus*, and *Bos primigenius*. They are followed by *Megaloceros ordosianus*, *Cervus elaphus*, *Coelodonta antiquitatis*, *Procapra przewalskii*, *Dicerorhinus mercki*, *Pachycrocuta cf. sinensis*, *Palaeoloxodon* sp., *Viverra cf. zibetha*, *Ursus* sp., *Sus lydekkeri*, *Hydropotes pleistocenica*, and *Axis shansius lingjingensis* subsp. nov. [47,48]. The skeletal element profile combined with the high frequency of cut marks (~34%) and their location on the bone are consistent with an interpretation of Lingjing Layer 11 as a kill-butchery site [49-52]. The proportion of bones bearing anthropogenic modifications is certainly underestimated due to the presence of thin concretions and manganese coatings on many remains, likely owing to the underground spring context in which they accumulated. The artefacts described in this study come exclusively from layer 11.

## Material and methods

The faunal assemblage from Lingjing (N > 50,000) is curated at the Henan Provincial Institute for Cultural Relics and Archaeology, ZhengZhou, China. The artefacts described in this study were identified during a project that aimed at reassessing the anthropogenic nature of flakes removals present on the periosteal and endosteal aspects of the faunal remains, which are interpreted as evidence of expedient osseous technologies [53,54].

A randomly selected sample of 227 bone fragments from the 2005-2015 excavations was studied with a Leica Wild M3C stereomicroscope equipped with a Nikon CoolPix 900 Digital Camera at magnifications ranging from 4x to 40x. Remains largely covered with concretions and manganese deposits were excluded from the analysis. Macroscopic photographs of the artefacts were taken with a Canon PowerShot 100 and a Nikon D300 AF Micro Nikkor 60 mm f/2.8D. Anthropogenic modifications were distinguished from natural ones on the basis of criteria known in the literature [55-58]. Identification of traces produced by the use of bone as retuchers, i.e., clusters of scores and pits present near the edge of a bone fragment, was based on experimental and archaeological studies [6,9,12,14,16,21,22,25-29,59-63]. Morphometric data were collected using a digital calliper and included the maximum length, width, and thickness of the bone fragment used as retoucher. When identifiable, the species and anatomical elements selected were recorded. Otherwise, an animal size class was estimated from the cortical thickness of the fragment. The number of pits, scores, and scale removals were counted. Traces of use as retoucher are described in accordance to the terminology proposed by Mallye *et al.* [6]. When grouped in clusters, the maximum length and width of the
<table><caption>Table 1. Bone modifications recorded on Lingjing faunal remains analysed in this study.</caption><thead><tr><th rowspan="2"></th><th rowspan="2">n</th><th colspan="3">Non-human</th><th colspan="3">Human</th></tr><tr><th>Root Etching</th><th>Carnivore</th><th>Digestion</th><th>Cutmarks</th><th>Marrow Extraction</th><th>Retouchers</th><th>Burnt Bone</th></tr></thead><tbody><tr><th>Total</th><td>227</td><td>50</td><td>9</td><td>5</td><td>54</td><td>8</td><td>8</td><td>3</td></tr><tr><th>Percentage</th><td>100%</td><td>22.03%</td><td>3.96%</td><td>2.20%</td><td>23.79%</td><td>3.52%</td><td>3.52%</td><td>1.32%</td></tr></tbody></table>

https://doi.org/10.1371/journal.pone.0194318.t001

concentration of marks were also recorded, as well as the orientation of the cluster relative to the tool's main axis [61–63].

# Results

## Bone modifications

Root etching is the main non-human post-depositional alteration recorded on the Lingjing faunal assemblage (22.03%; Table 1). Surfaces not affected by this process are exceptionally well preserved and allow for a precise identification of anthropogenic modifications. Carnivore gnawing and etching due to digestion were recorded on respectively 3.96% and 2.20% of the sample. Hyena remains are signalled in the faunal spectrum [47] and hyena coprolites were found [64,65]. The low percentage of faunal remains modified by carnivores, the high cranial-postcranial ratio, the high percentage of cut-marked bones (see below), the presence of complete epiphysis, and the mortality profile dominated by prime adults [51] suggest that hyenas played a marginal role in the accumulation of the bone assemblage, and only had a secondary access to carcasses [66].

Cut marks are the main anthropogenic modification recorded on the faunal assemblage (23.79%). Other modifications include percussion marks, possibly for marrow extraction (3.52%), traces of utilization as retouchers (3.52%), and staining produced by heat (1.32%).

## Bone retouchers

Six limb bone fragments and one antler of an axis deer bear evidence for having been used as soft hammers (Table 2). Specimen 6L1326 (Fig 2) is a fragment of a limb bone from a medium

<table><caption>Table 2. Descriptive and morphometric data on Lingjing (layer 11) bone retouchers.</caption><thead><tr><th>Catalogue no.</th><th>Animal size</th><th>Species</th><th>Element</th><th>Lateral Fractures</th><th>Distal End Fracture</th><th>Proximal End Fracture</th><th>Number of knapping areas</th><th>Length (mm)</th><th>Width (mm)</th><th>Thickness (mm)</th><th>Cortical thickness (mm)</th></tr></thead><tbody><tr><td>6L1326</td><td>M</td><td>indet.</td><td>Limb Bone</td><td>F &amp; W</td><td>W</td><td>W</td><td>1</td><td>84.02</td><td>24.86</td><td>13.38</td><td>7.57</td></tr><tr><td>6L1657</td><td>M</td><td>Cervid sp.</td><td>Metapodial</td><td>W</td><td>R</td><td>W</td><td>1</td><td>81.29</td><td>23.95</td><td>16.23</td><td>6.94</td></tr><tr><td>6L1881</td><td>M</td><td>Cervid sp.</td><td>Metapodial</td><td>W</td><td>W</td><td>R</td><td>1</td><td>63.31</td><td>22.33</td><td>11.9</td><td>7.7</td></tr><tr><td>6L1980</td><td>L</td><td>indet.</td><td>Limb Bone</td><td>F</td><td>F</td><td>F</td><td>2</td><td>107.01</td><td>48.79</td><td>28.41</td><td>11.82</td></tr><tr><td>6L2191</td><td>L</td><td>indet.</td><td>Limb Bone</td><td>F</td><td>F</td><td>F</td><td>1</td><td>133.95</td><td>37.58</td><td>20.95</td><td>8.93</td></tr><tr><td>7L603</td><td>L</td><td>indet.</td><td>Limb Bone</td><td>F</td><td>F</td><td>F</td><td>1</td><td>110.15</td><td>42.13</td><td>26.96</td><td>12.45</td></tr><tr><td>9L0151</td><td>S-M</td><td>Axis shansius</td><td>Antler</td><td>—</td><td>R</td><td>R</td><td>1</td><td>216.74</td><td>26.57*</td><td>24.69*</td><td>4.67**</td></tr></tbody></table>

Animal size: S = Small; M = Medium; L = Large

Fractures: F = Fresh; R = Recent; W = Weathered

* Calculated to the mid-point of the first beam section

** Calculated at the base

https://doi.org/10.1371/journal.pone.0194318.t002
<figure><img src="image_6.png" /><figcaption>**Fig 2. Retoucher 6L1326 from Lingjing.** White bracket indicates the area where impact scars are present. Scales = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g002

size mammal that presents both weathered and fresh fractures. The periosteal surface is slightly eroded and marginally affected by root etching. The fragment features, close to one end, a palimpsest of irregular deep scores, trihedral impacts with rough internal morphology, and removals of cortical lamellae. On the medullar surface, close to the same end, few contiguous flake scars modify the bone lateral morphology.

Specimen 6L1657 (Fig 3) is a mesial fragment of a cervid metapodial featuring weathered fractures, cut marks, and exfoliation of primary bone lamellae. Both periosteal and medullar

<figure><img src="image_7.png" /><figcaption>**Fig 3. Retoucher 6L1657 from Lingjing.** White brackets indicate the areas where impact scars are present. Scales = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g003
<figure><img src="image_8.png" /><figcaption>**Fig 4.** Retoucher 6L1881 from Lingjing. White bracket indicates the area where impact scars are present. Scale = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g004

surfaces are partially covered with concretions. At one end, two clusters of impacts with even internal morphology, irregular or trihedral in shape, are located on the ridges flanking the metapodial central trough. These impact scars are associated with scores and removals of primary bone lamellae. Striations originating from the impact scars suggest that, in some instances, the lithic edge kept occasional contact with the bone surface after the blow. Continuous flake scars may have been removed to thin the opposite end of the bone.

Specimen 6L1881 (Fig 4) is a proximal fragment of a cervid metapodial that bears evidence of weathered and recent fractures, and few concretions. A palimpsest of deep sub-rectangular scores, trihedral impact scars, and removals of primary bone lamellae covers half of the perios- teal surface. The internal morphology of the stigmata is rough. Few flake scars are observed on one edge of the periosteal surface close to the area bearing scores and pits.

Specimen 6L1980 (Fig 5) is a long bone fragment from an undetermined large size mammal showing fresh fractures, cut marks, root etching, and concretions. Both ends present small clusters of scattered trihedral impact scars with rough internal morphology. One edge is modi- fied by continuous marginal flake removals on the medullar and the periosteal surfaces.

Specimen 6L2191 (Fig 6) is a long bone fragment from an undetermined large size mammal that bears evidence of fresh fractures, cut marks, and periosteal flake removals. It features, at one end, a cluster of curved scores with even internal morphology produced while re- touching the same cutting edge. Closer to the edge, retouching a sharp lithic point produced
<figure><img src="image_9.png" /><figcaption>**Fig 5.** Retoucher 6L1980 from Lingjing. White brackets indicate the areas where impact scars are present. Scale (macro) = 1 cm; scales (micro) = 5 mm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g005

microscopic trihedral impacts and flake scars. A single large trihedral impact with a rough internal morphology associated with the uplifting of the primary bone lamellae is observed on another area of the periosteal surface (Fig 6).

Specimen 7L603 (Fig 7) is a long bone fragment from an undetermined large size mammal that bears evidence of fresh fractures, cut marks, exfoliation of the primary bone lamellae, and concretions. It features at one end a cluster of scores as well as trihedral and sub-circular impact scars. Both scores and scars display a rough internal morphology and a number are associated with the removal of primary bone lamellae.

Specimen 9L0151 (Fig 8) is an incomplete right antler of an *Axis shansius* subadult. The surface is slightly damaged by root etching. The base, the first tine, and the tip tine present recent

<figure><img src="image_10.png" /><figcaption>**Fig 6.** Retoucher 6L2191 from Lingjing. White brackets indicate the areas where impact scars are present. Scale (macro) = 1 cm; scales (micro) = 5 mm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g006
<figure><img src="image_11.png" /><figcaption>**Fig 7.** Retoucher 7L603 from Lingjing. White bracket indicates the area where impact scars are present. Scales = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

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fractures. The trez tine [67] shows an old fracture. A few concretions coat the proximal half of the antler, at the junction of the main beam and both the first tine and trez tine. A number of sub-circular and trihedral impact scars as well as linear scores are present on the anterior, lateral and posterior aspects of the antler tip (Fig 9). Most scores cluster in a small area on the lateral aspect. Both scores and scars have a rough internal morphology.

## Summary

Three types of soft hammers were recovered at Lingjing (Tables 2 and 3). The first type consists of weathered limb bone fragments, mostly mesial splinters of cervid metapodials, which were marginally shaped by retouching and intensively utilized on a single area (6L1326, 6L1657, 6L1881). The second type corresponds to limb bone fragments from large size mammal bearing fresh fractures. Traces of their utilization as retouchers occur on one or more areas and generally consist of few shallow impacts left by knapping the same cutting edge during a single session (6L1980, 6L2191, 7L603). These two types differ in size, the former being substantially smaller, and comparatively more elongated and standardized (Fig 10). The third type, represented by a single specimen, consists of a cervid antler bearing, close to its tip, impacts produced by percussing different lithic blanks.

## Discussion

Archaeozoological, technological, functional, and morphometric results highlight that soft hammers used at Lingjing reflect three distinct behavioural strategies. The first entailed the use of large bone flakes resulting from butchery of large herbivores that were utilized as such for expedient retouching or resharpening of stone tools, likely during carcass processing. These objects were quickly discarded after their utilization. The second involved the fracture of weathered bone from medium size herbivores to obtain elongated splinters and, in some instance, their shaping by percussion to obtain sub-rectangular artefacts. Traces observed on
<figure><img src="image_12.png" /><figcaption>**Fig 8. Retoucher 9L0151 from Lingjing.** White bracket indicates the area where impact scars are present. Scale = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g008

<figure><img src="image_13.png" /><figcaption>**Fig 9. Close up views of the retoucher 9L0151 from Lingjing.** Scales = 1 cm. See Tables 2 and 3 for additional information.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g009
<table><caption>Table 3. Technological data on Lingjing (layer 11) bone retoucher and soft hammer.</caption><thead><tr><th>Catalogue no.</th><th>Used area length (mm)</th><th>Used area width (mm)</th><th>Number of Sub-spherical pits</th><th>Number of trihedral pits</th><th>Number of scores</th><th>Number of scale removals</th><th>Lateral Shaping</th><th>Internal Morphology</th></tr></thead><tbody><tr><td>6L1326</td><td>19.95</td><td>8.42</td><td>—</td><td>20</td><td>18</td><td>29</td><td>Yes</td><td>Rough</td></tr><tr><td>6L1657</td><td>13.32</td><td>16.58</td><td>—</td><td>11</td><td>6</td><td>14</td><td>Yes</td><td>Even</td></tr><tr><td>6L1881</td><td>40.91</td><td>14.62</td><td>—</td><td>14</td><td>23</td><td>4</td><td>Yes</td><td>Rough</td></tr><tr><td>6L1980 Dist.</td><td>12.84</td><td>10.95</td><td>—</td><td>15</td><td>—</td><td>14</td><td>Yes</td><td>Rough</td></tr><tr><td>6L1980 Prox.</td><td>10.59</td><td>8.92</td><td>—</td><td>9</td><td>—</td><td>8</td><td>Yes</td><td>Rough</td></tr><tr><td>6L2191</td><td>12.05</td><td>13.69</td><td>—</td><td>15</td><td>24</td><td>1</td><td>—</td><td>Even and Rough</td></tr><tr><td>7L603</td><td>13.41</td><td>11.16</td><td>8</td><td>18</td><td>10</td><td>12</td><td>—</td><td>Rough</td></tr><tr><td>9L0151</td><td>15.75</td><td>8.1</td><td>4</td><td>3</td><td>9</td><td>—</td><td>—</td><td>Rough</td></tr></tbody></table>

https://doi.org/10.1371/journal.pone.0194318.t003

these objects indicate intensive and possibly recurrent utilization, which implies their curation over time. The last corresponds to the occasional use of curated antlers as soft hammer, which may also have fulfilled other functions. The above highlights different logics for the production and use of bone retouchers. The first retoucher type satisfies an immediate need. The second implies long-term planning, and the modification of the blank to impose a shape to the tool, in order to improve its ergonomics, transportability, and efficiency. The third is probably a multi-purpose implement occasionally used as an expedient soft hammer.

These results have implications for the ongoing debate on the nature and distinctiveness of the Chinese Palaeolithic. Most Chinese lithic industries dated between 300 ka and 40 ka are characterized by the persistence of core-and-flake knapping, the use of poor-quality local raw materials, the rarity of prepared cores and their reduction with direct hard hammer percussion, bipolar percussion, and block-on-block technique, the absence of evidence for soft hammer percussion, the rarity of retouched flakes, and the lack of obvious temporal trends [38]. This pattern contrasts with penecontemporaneous technical innovations (raw material

<figure><img src="image_14.png" /><figcaption>Fig 10. a) Comparison between the width and thickness of Lingjing osseous retouchers; b) Comparison between the width and length of Lingjing osseous retouchers.</figcaption></figure>

https://doi.org/10.1371/journal.pone.0194318.g010
selection, Levallois debitage, use of soft hammer, systematic shaping of stone tools by retouch) signalling the emergence of the Middle Palaeolithic in the remainder of Eurasia. The absence of Middle Palaeolithic technologies in large areas of China is considered by some to be the consequence of relatively stable environmental conditions, absence of large-scale population replacement events, low-intensity resources exploitation, high group mobility, the production of perishable tools made of bamboo, and a preference for simple yet flexible stone tool technologies [38,68–73]. As a result, a number of researchers have argued that the term Middle Palaeolithic has no real meaning in most of East Asia [36, 37, 39, 74, 75] and should be restricted to assemblages located in peripheral areas, i.e., the Ningxia Autonomous Region [36], the Jilin Province [76,77], and the Inner Mongolia [78], where Middle Palaeolithic diagnostics are present in the lithic assemblages. Others use this term conventionally to designate occupations falling within the range of 300 ka to 40 ka BP, or yielding remains of archaic *Homo sapiens*. Finally, some contend that innovative technologies are present in Chinese assemblages of this period and that their attribution to the Middle Palaeolithic is therefore fully justified [35].

The first obvious implication of our results for the above debate is that soft hammers were used for knapping during the early Late Pleistocene of East Asia, and that this occurred outside the regions in which the Levallois technique is documented. The three types of soft hammers identified at Lingjing demonstrate a good knowledge of the properties of osseous materials for knapping purposes. The shaping and probable curation of one tool type suggest that these tools represented an integral element of the toolkit used by Lingjing hominins. This is also supported by the analysis of the traces of utilization. The overall rough internal morphology of scores and pits indicates, based on experimental results [6], that the three soft hammer types were used to knap coarse lithic raw material such as quartz or quartzite, which represents more than 99% of the knapped lithics found in layer 11. Bone retuchers were therefore essential in knapping activities and it is very likely that additional specimens will be identified in the course of the ongoing reassessment of the Lingjing faunal assemblage. It is also very likely that soft hammers made of bone or antler represent an unrecognized feature of early Late Pleistocene or older Chinese assemblages. The traces of their use bear some similarities with bone modifications produced by other agents and these traces were not systematically searched for during the taphonomic analysis of most Chinese bone assemblages dated to this period.

A broader implication of our results concerns the nature of East Asian early Late Pleistocene cultural adaptations. The behavioural complexity revealed by Lingjing soft hammers suggests that the apparent simplicity of this lithic technology and that of other contemporaneous sites may be illusory as lithics only represented an aspect of past cultural adaptations. The discovery of bone tools effectively complements what we know about these technical systems and highlights behavioural consistencies that could not be inferred from other cultural proxies. These consistencies provide a new dimension to the debate surrounding the existence of the Middle Palaeolithic in this region of the world. The attribution of East Asian sites to the Middle Palaeolithic is generally based either on their chronology or on the occurrence of cultural traits pertaining to lithic technology such as the Levallois debitage. This approach assumes that the chosen traits represent evolutionary hallmarks applicable to regions of the world different from those in which they were originally identified. An alternative approach, that we wish to promote here, consists in identifying original characters of regional cultural trajectories from a variety of aspects of past material culture, and understanding the behavioural and cognitive implications they may have had for past hominin populations.
Acknowledgments

We thank Dr. Michelle Langley and another anonymous reviewer for their constructive sug-
gestions. We also wish to thank Ma HuanHuan and Zhao Qing-Po for their help in the data
acquisition, as well as Myriam Boudadi-Maligne Jean-Baptiste Mallye, and Jean-Philippe
Faivre for discussions on Middle Palaeolithic bone retouchers.

**Author Contributions**

**Conceptualization:** Luc Doyon, Francesco d'Errico.

**Data curation:** Zhanyang Li, Hao Li.

**Formal analysis:** Luc Doyon, Francesco d'Errico.

**Funding acquisition:** Luc Doyon, Zhanyang Li, Hao Li, Francesco d'Errico.

**Investigation:** Luc Doyon, Zhanyang Li, Hao Li, Francesco d'Errico.

**Methodology:** Luc Doyon, Francesco d'Errico.

**Writing – original draft:** Luc Doyon, Francesco d'Errico.

**Writing – review & editing:** Luc Doyon, Zhanyang Li, Hao Li, Francesco d'Errico.

**References**

1. Inizan M-L, Reduron M, Roche H, Tixier J. Préhistoire de la pierre taillée, Vol. 4, Technologie de la pierre taillée, suivi par un dictionnaire multilingue allemand, anglais, arabe, espagnol, français, grec, italien, portugais. Meudon: C.R.E.P.; 1995.

2. Patou-Mathis M, Schwab C. Fiche générale. In: Patou-Mathis M, editor. Retouchoirs, Compresseurs, Percuteurs Os à impressions et éraillures Fiches de la Commission de Nomenclature sur l'Industrie de l'Os Préhistorique Cahier X. Paris: Éditions de la Société Préhistorique Française; 2002. pp. 11–19.

3. Henri-Martin L. Maillets ou enclumes en os provenant de la couche moustérienne de la Quina (Cha-rente). Bull Société Préhistorique Fr. 1906; 3: 155–162.

4. Semenov SA. Prehistoric Technology. London: Cory, Adams and MacKay; 1964.

5. Chase PG. Tool-Making Tools and Middle Paleolithic Behavior. Curr Anthropol. 1990; 31: 443–447.
https://doi.org/10.2307/2743276

6. Mallye J-B, Thiébaut C, Mourre V, Costamagno S, Claud É, Weisbecker P. The Mousterian bone retouchers of Noisetier Cave: experimentation and identification of marks. J Archaeol Sci. 2012; 39: 1131–1142. https://doi.org/10.1016/j.jas.2011.12.018

7. Vincent A. L'outillage osseux au Paléolithique moyen: une nouvelle approche. Ph.D. Thesis, Université de Paris X. 1993.

8. Patou-Mathis M, editor. Retouchoirs, Compresseurs, Percuteurs. Os à impressions et éraillures. Fiches de la Commission de Nomenclature sur l'Industrie de l'Os Préhistorique. Cahier X. Paris: Éditions de la Société Préhistorique Française; 2002.

9. Backwell LR, d'Errico F. The first use of bone tools: a reappraisal of the evidence from Olduvai Gorge, Tanzania. Palaeontol Afr. 2005; 40: 95–158.

10. Goren-Inbar N. Behavioral and Cultural Origins of Neanderthals: A Levantine Perspective. In: Condemi S, Weniger G-C, editors. Continuity and Discontinuity in the Peopling of Europe. Springer Netherlands; 2011. pp. 89–100. https://doi.org/10.1007/978-94-007-0492-3_8

11. Smith GM. Taphonomic resolution and hominin subsistence behaviour in the Lower Palaeolithic: differing data scales and interpretive frameworks at Boxgrove and Swanscombe (UK). J Archaeol Sci. 2013; 40: 3754–3767. https://doi.org/10.1016/j.jas.2013.05.002

12. d'Errico F, Henshilwood CS. Additional evidence for bone technology in the southern African Middle Stone Age. J Hum Evol. 2007; 52: 142–163. https://doi.org/10.1016/j.jhevol.2006.08.003 PMID: 16996574

13. Van Kolfschoten T, Parfitt SA, Serangeli J, Bello SM. Lower Paleolithic bone tools from the 'Spear Horizon' at Schöningen (Germany). J Hum Evol. 2015; 89: 226–263. https://doi.org/10.1016/j.jhevol.2015.09.012 PMID: 26653208
14. Moigne A-M, Valensi P, Auguste P, García-Solano J, Tuffreau A, Lamotte A, et al. Bone retouchers from Lower Palaeolithic sites: Terra Amata, Orgnac 3, Cagny-l'Epinette and Cueva del Angel. Quat Int. 2016; 409: 195-212. https://doi.org/10.1016/j.quaint.2015.06.059

15. Daujeard C, Valensi P, Fiore I, Moigne A-M, Tagliacozzo A, Moncel M-H, et al. A reappraisal of Lower to Middle Palaeolithic bone retouchers from Southeastern France (MIS 11 to 3). The Origins of Bone Tool Technologies. Mainz: RGZM; 2017. pp. 1-40.

16. Blasco R, Rosell J, Cuartero F, Fernández Peris J, Gopher A, Barkai R. Using Bones to Shape Stones: MIS 9 Bone Retouchers at Both Edges of the Mediterranean Sea. PLoS ONE. 2013; 8: e76780. https://doi.org/10.1371/journal.pone.0076780 PMID: 24146928

17. Rosell J, Blasco R, Campeny G, Díez JC, Alcalde RA, Menéndez L, et al. Bone as a technological raw material at the Gran Dolina site (Sierra de Atapuerca, Burgos, Spain). J Hum Evol. 2011; 61: 125-131. https://doi.org/10.1016/j.jhevol.2011.02.001 PMID: 21420719

18. Langlois A. Au sujet du Cheval de La Micoque (Dordogne) et des comportements humains de subsistance au Pléistocène moyen dans le nord-est de l'Aquitaine. Ph.D. Thesis, Bordeaux 1. 2004. Available: http://www.theses.fr/2004BOR12894

19. Moncel M-H, Moigne A-M, Combier J. Towards the Middle Palaeolithic in Western Europe: The case of Orgnac 3 (southeastern France). J Hum Evol. 2012; 63: 653-666. https://doi.org/10.1016/j.jhevol.2012.08.001 PMID: 23040107

20. Julien M-A, Hardy B, Stahlschmidt MC, Urban B, Serangeli J, Conard NJ. Characterizing the Lower Paleolithic bone industry from Schöningen 12 II: A multi-proxy study. J Hum Evol. 2015; 89: 264-286. https://doi.org/10.1016/j.jhevol.2015.10.006 PMID: 26651609

21. Karavanić I, Šokec T. The Middle Paleolithic Percussion or Pressure Flaking Tools? The comparison of experimental and archaeological material from Croatia. Pril Instituta Za Arheol U Zagrebu. 2003; 20: 5-14.

22. Jéquier CA, Romandini M, Peresani M. Les retouchoirs en matières dures animales: une comparaison entre Moustérien final et Uluzzien. Comptes Rendus Palevol. 2012; 11: 283-292. https://doi.org/10.1016/j.crpv.2011.12.001

23. Tartar É. Réflexion autour de la fonction des retouchoirs en os de l'Aurignacien ancien. Bull Société Préhistorique Fr. 2012; 109: 69-83.

24. Abrams G, Bello SM, Di Modica K, Pirson S, Bonjean D. When Neanderthals used cave bear (Ursus spelaeus) remains: Bone retouchers from unit 5 of Scladina Cave (Belgium). Quat Int. 2014; 326-327: 274-287. https://doi.org/10.1016/j.quaint.2013.10.022

25. Daujeard C, Moncel M-H, Fiore I, Tagliacozzo A, Bindon P, Raynal J-P. Middle Paleolithic bone retouchers in Southeastern France: Variability and functionality. Quat Int. 2014; 326-327: 492-518. https://doi.org/10.1016/j.quaint.2013.12.022

26. Hardy M, Pothier Bouchard G, Doyon L. Un outil en os à usages multiples dans un contexte moustérien. Bull Société Préhistorique Fr. 2014; 111: 741-744.

27. Jéquier C, Peresani M, Romandini M, Delpiano D, Joannes-Boyau R, Lembo G, et al. The De Nadale Cave, a single layered Quina Mousterian site in the North of Italy. Quartär. 2015; 65: 7-21. https://doi.org/10.7485/QU62_1

28. Tejero J-M, Arrizabalaga Á, Villaluenga A. The Proto-Aurignacian and Early Aurignacian retouchers of Labeko Koba (Basque Country, Spain). A techno-economic and chrono-cultural interpretation using lithic and faunal data. Comptes Rendus Palevol. 2016; 15: 994-1010. https://doi.org/10.1016/j.crpv.2016.05.003

29. Yeshurun R, Tejero J-M, Barzilai O, Hershkovitz I, Ofer M. Upper Palaeolithic Bone retouchers from Manot Cave (Israel): A preliminary analysis of a (yet) rare phenomenon in the Levant. The Origins of Bone Tool Technologies. Mainz: RGZM; 2017. pp. 1-9.

30. Verna C, d'Errico F. The earliest evidence for the use of human bone as a tool. J Hum Evol. 2011; 60: 145-157. https://doi.org/10.1016/j.jhevol.2010.07.027 PMID: 21131024

31. Rougier H, Crevecoeur I, Beauval C, Posth C, Flas D, Wißing C, et al. Neandertal cannibalism and Neandertal bones used as tools in Northern Europe. Sci Rep. 2016; 6: srep29005. https://doi.org/10.1038/srep29005 PMID: 27381450

32. Kolobova KA, Markin SV, Chabai VP. Bone retouchers in the Middle Paleolithic complexes of Chagyrskaya Cave. Theory Pract Archaeol Res. 2016; 4: 35-39.

33. Rudaya N, Vasiliev S, Viola B, Talamo S, Markin S. Palaeoenvironments during the period of the Neandertals settlement in Chagyrskaya cave (Altai Mountains, Russia). Palaeogeogr Palaeoclimatol Palaeoecol. 2017; 467: 265-276. https://doi.org/10.1016/j.palaeo.2015.12.007

34. Zhang SS. Preliminary investigation of the Middle Palaeolithic in north China. Prehist Res. 1985; 1: 8-22.
35. Yee MK. The Middle Palaeolithic in China a review of current interpretations. Antiquity. 2012; 86: 619–626. https://doi.org/10.1017/S0003598X00047803

36. Gao X, Norton CJ. A critique of the Chinese 'Middle Palaeolithic.' Antiquity. 2002; 76: 397–412. https://doi.org/10.1017/S0003598X00090517

37. Norton CJ, Gao X, Feng X. The East Asian Middle Paleolithic Reexamined. In: Camps M, Chauhan P, editors. Sourcebook of Paleolithic Transitions: Methods, Theories, and Interpretations. New York: Springer; 2009. pp. 245–254. https://doi.org/10.1007/978-0-387-76487-0_15

38. Gao X. Paleolithic Cultures in China: Uniqueness and Divergence. Curr Anthropol. 2013; 54: S358–S370. https://doi.org/10.1086/673502

39. Li F. Fact or fiction: the Middle Palaeolithic in China. Antiquity. 2014; 88: 1303–1309. https://doi.org/10.1017/S0003598X00115479

40. Li Z. A Primary Study on the Stone Artifacts of Lingjing Site Excavated in 2005. Acta Anthropol Sin. 2007; 26: 138–154.

41. Chen C. Preliminary exploration of the typology and technology of microcore in China—also of the culture relationship between Northeast Aria and Northwestern North America. Acta Anthropol Sin. 1983; 2: 331–346.

42. Li Z, Ma H. Techno-typological analysis of the microlithic assemblage at the Xuchang Man site, Lingjing, central China. Quat Int. 2016; 400: 120–129. https://doi.org/10.1016/j.quaint.2015.08.065

43. Li Z, Kunikita D, Kato S. Early pottery from the Lingjing site and the emergence of pottery in northern China. Quat Int. 2017; 441: 49–61. https://doi.org/10.1016/j.quaint.2016.06.017

44. Li Z, Wu X, Zhou L, Liu W, Gao X, Nian X, et al. Late Pleistocene archaic human crania from Xuchang, China. Science. 2017; 355: 969–972. https://doi.org/10.1126/science.aal2482 PMID: 28254945

45. Trinkaus E, Wu X-J. External auditory exostoses in the Xuchang and Xujiyao human remains: Patterns and implications among eastern Eurasian Middle and Late Pleistocene crania. PLOS ONE. 2017; 12: e0189390. https://doi.org/10.1371/journal.pone.0189390 PMID: 29232394

46. Nian XM, Zhou LP, Qin JT. Comparisons of equivalent dose values obtained with different protocols using a lacustrine sediment sample from Xuchang, China. Radiat Meas. 2009; 44: 512–516. https://doi.org/10.1016/j.radmeas.2009.06.002

47. Li Z, Dong W. Mammalian Fauna from the Lingjing Paleolithic Site in Xuchang, Henan Province. Acta Anthropol Sin. 2007; 26: 345–360.

48. Dong W, Li Z. New Cervids (Artiodactyla, Mammalia) from the Late Pleistocene of Lingjing Site in Henan Province, China. Acta Anthropol Sin. 2009; 28: 319–326.

49. Zhang S, Li Z, Zhang Y, Gao X. Mortality profiles of the large herbivores from Lingjing Xuchang Man Site, Henan Province and the early emergence of the modern human behaviours in East Asia. Chin Sci Bull. 2009; 54: 3857–3863.

50. Zhang S, Li Z, Zhang Y, Gao X. Cultural Modifications on the Animal Bones from the Lingjing Site, Henan Province. Acta Anthropol Sin. 2011; 30: 313–326.

51. Zhang S, Gao X, Zhang Y, Li Z. Taphonomic analysis of the Lingjing fauna and the first report of a Middle Paleolithic kill-butchery site in North China. Chin Sci Bull. 2011; 56: 3213–3219.

52. Zhang S, Li Z, Zhang Y, Gao X. Skeletal element distributions of the large herbivores from the Lingjing site, Henan Province, China. Sci China Earth Sci. 2012; 55: 246–253.

53. Li Z, Shen C. Use-wear analysis confirms the use of Palaeolithic bone tools by the Lingjing Xuchang early human. Chin Sci Bull. 2010; 55: 2282–2289. https://doi.org/10.1007/s11434-010-3089-4

54. Li Z, Shen C. Excavation report of the Lingjing Paleolithic Site in 2006. Chin Archaeol. 2011; 11: 65–73.

55. Behrensmeyer AK. Taphonomic and Ecologic Information from Bone Weathering. Paleobiology. 1978; 4: 150–162.

56. Shipman P, Rose P. Bone tools: an experimental approach. In: Olsen SL, editor. Scanning Electron Microscopy in Archaeology. Oxford: British Archaeological Reports; 1988. pp. 303–335.

57. Lyman RL. Vertebrate Taphonomy. New York: Cambridge University Press; 1994.

58. Fisher JW. Bone surface modifications in zooarchaeology. J Archaeol Method Theory. 1995; 2: 7–68. https://doi.org/10.1007/BF02228434

59. Jéquier CA. Techno-économie des industries en matières dures d'origine animale entre le Paléolithique moyen et supérieur en Italie orientale et Slovénie. Ph.D. Thesis, Universita degli Studi di Ferrara. 2014.

60. Malerba G, Giacobini G. Fiche éclats diaphysaires. In: Patou-Mathis M, editor. Retouchoirs, Compresseurs, Percuteurs Os à impressions et éraillures Fiches de la Commission de Nomenclature sur l'Industrie de l'Os Préhistorique Cahier X. Paris: Éditions de la Société Préhistorique Française; 2002. pp. 29–38.
61. Mozota Holgueras M. Estudio tafonómico y tecnológico de un útil doble "cincel/retocador", proveniente del nivel C (Musteriense) de Axlor-Dima, Bizkaia. Zephyrus. 2008; 61: 217-224.

62. Mozota Holgueras M. El utillaje óseo musteriense del nivel "D" de Axlor (Dima, Vizcaya): análisis de la cadena operativa. Trab Prehist. 2009; 66: 28-46. https://doi.org/10.3989/tp.2009.09011

63. Mozota Holgueras M. El hueso como material prima: El utillaje óseo del final del Musteriense en el sector central del norte de la Península Ibérica. Ph.D. Thesis, Universidad de Cantabria. 2012.

64. Wang W, Wu Y, Song G, Zhao K, Li Z. Pollen and fungi spore analysis on Hyaenid coprolite from the Xuchang Man Site, Central China. Chin Sci Bull. 2014; 58: 51-56. https://doi.org/10.1360/tb-2013-suppl004

65. Wang W, Li Z, Song G, Wu Y. A Study of Possible Hyaena Coprolites from the Lingjing Site, Central China. Acta Anthropol Sin. 2015; 34: 117-125.

66. Cruz-Uribe K. Distinguishing Hyena from Hominid Bone Accumulations. J Field Archaeol. 1991; 18: 467-486. https://doi.org/10.1179/009346991791549068

67. GDRE Préhistos. Multilingual lexicon of bone industries. Version 1. Part I: Français, English, Italiano, Español [Internet]. 2010 [cited 6 Dec 2017]. Available: http://gdreprehistos.cnrs.fr/medias/fichier/gdre-prehistos-archaeological-studies-1_1355233470300-pdf

68. Bar-Yosef O, Eren MI, Yuan J, Cohen DJ, Li Y. Were bamboo tools made in prehistoric Southeast Asia? An experimental view from South China. Quat Int. 2012; 269: 9-21. https://doi.org/10.1016/j.quaint.2011.03.026

69. Boëda É, Hou Y-M. Analyse des artefacts lithiques du site de Longgupo. L'Anthropologie. 2011; 115: 78-175. https://doi.org/10.1016/j.anthro.2010.12.005

70. Boëda E, Hou Y-M. Étude du site de Longgupo-Synthèse. L'Anthropologie. 2011; 115: 176-196. https://doi.org/10.1016/j.anthro.2010.12.001

71. Pope GG. Recent Advances in Far Eastern Paleoanthropology. Annu Rev Anthropol. 1988; 17: 43-77. https://doi.org/10.1146/annurev.an.17.100188.000355

72. Schick KD, Dong Z. Early paleolithic of China and eastern Asia. Evol Anthropol Issues News Rev. 1993; 2: 22-35. https://doi.org/10.1002/evan.1360020105

73. Wang Y-P. The Roots of Pleistocene Hominids and Cultures in China. Beijing: Science Press; 2005.

74. Ikawa-Smith F. The early Paleolithic tradition of East Asia. Ikawa-Smith F, editor. The Hague: Mouton; 1978.

75. Seong C, Bae CJ. The eastern Asian 'Middle Palaeolithic' revisited: a view from Korea. Antiquity. 2016; 90: 1151-1165. https://doi.org/10.15184/aqy.2016.141

76. Wang X-K, Wei J, Chen Q-J, Tang Z-W, Wang C-X. A Preliminary Study on the Excavation of the Jinsitai Cave Site. Acta Anthropol Sin. 2010; 29: 15-32.

77. Li F, Kuhn SL, Chen F, Wang Y, Southon J, Peng F, et al. The easternmost Middle Paleolithic (Mousterian) from Jinsitai Cave, North China. J Hum Evol. 2018; 114: 76-84. https://doi.org/10.1016/j.jhevol.2017.10.004 PMID: 29447762

78. Chen H, Hou Y-M, Yang Z, Zhen Z, Lian H, Liu Y. A preliminary study on human behavior and lithic function at the Wulanmulun site, Inner Mongolia, China. Quat Int. 2014; 347: 133-138. https://doi.org/10.1016/j.quaint.2014.04.049