Aposphragisma baltenspergerae Thoma 2014, sp. nov.
Creators: name: THOMA, MARCO
name: KRANZ-BALTENSPERGER, YVONNE
name: KROPF, CHRISTIAN
name: GRABER, WERNER
name: NENTWIG, WOLFGANG
name: FRICK, HOLGER
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Oonopidae
Aposphragisma
Aposphragisma baltenspergerae

description: Aposphragisma baltenspergerae Thoma, sp. nov.
(Figs. 1–4)
Type material. HOLOTYPE: male (PBI_OON 00031365), Kalimantan (INDONESIA), Sepaku, 40 km NNW of Balikpapan [0°55′S 116°47′E; inf.], 2.VIII.1980, degraded primary forest, leg. C. Deeleman, deposited at RMNH. PARATYPES: 1 female (PBI_OON 00015856; abdomen used for examination of internal genitalia), Kalimantan (INDONESIA), Sotek [01°12′S 116°35′E; inf.], 31.XII.1980, leg. J. Aoki & H. Harada, deposited at NMBE; 1 female (PBI_OON 00015869), Kalimantan (INDONESIA), 2 km E of Camp Pemantus, 43 km W of Sotek [01°12′S 116°12′E; inf.], 17.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT; 1 male (PBI_ OON 00015870), Kalimantan (INDONESIA), 5 km W of Sotek [01°12′S 116°35′E; inf.], 29.XII.1980, leg. J. Aoki, deposited at MZT; 1 male (PBI_OON 00015911), Kalimantan (INDONESIA), Camp Pemantus, 45 km W of Sotek [01°12′S 116°12′E; inf.], 19.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT; 1 female (PBI_OON 00015924), Kalimantan (INDONESIA), 2 km E of Camp Pemantus, 43 km W of Sotek [01°12′S 116°12′E; inf.], 18.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT; 1 male (PBI_OON 00015925), Kalimantan (INDONESIA), Camp Pemantus, 45 km W of Sotek [01°12′S 116°12′E; inf.], 29.XII.1980, leg. H. Harada, deposited at NMBE; 1 male (PBI_OON 00015966), Kalimantan (INDONESIA), at the foot of Mt. Pemantus, 50 km W of Sotek [01°12′S 116°12′E; inf.], 24.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT; 1 male (PBI_OON 00015967), Kalimantan (INDONESIA), Camp Pemantus, 45 km W of Sotek [01°12′S 116°12′E; inf.], 26.XII.1980, leg. H. Harada, deposited at MZT; 1 female (PBI_OON 00031362), Kalimantan (INDONESIA), Tenggarong [0°22′S 116°59′E; inf.], 4.VIII.1980, lichtbos, strooisel, leg. C. Deeleman, deposited at RMNH; 1 female (PBI_OON 00031376), Kalimantan (INDONESIA), Samboga, 40 km N of Balikpapan [0°55′S 116°52′E; inf.], 6.VIII.1980, leg. C. Deeleman, deposited at RMNH; 2 males (PBI_OON 00031399), Kalimantan (INDONESIA), 1 km E of Sotek [01°12′S 116°35′E; inf.], 31.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT; 2 females (PBI_OON 00031475), Kalimantan (INDONESIA), Samarinda distr., Sanga Sanga Muara [0°35′S 117°15′E; inf.], 29.X.1979, jungle litter, leg. P. T. Lehtinen, deposited at MZT.
Non-type material. 1 male (PBI_OON 00015855; partly used for SEM), collected together with paratypes (PBI_OON 00031399), deposited at NMBE.
Etymology. The species epithet is dedicated to Yvonne Kranz-Baltensperger (*1966), a NMBE arachnologist and PBI participant, mainly working on the revisions of the oonopid genera Ischnothyreus and Xyphinus.
Diagnosis. A. baltenspergerae sp. nov. belongs to the stripe-clade and can be distinguished from other species of this clade by the combination of the following traits: carapace without spikes (Fig. 1G); carapace margin with blunt denticles, sluice (slu) restricted to posterior margin (Fig. 1D); epigastric scutum in females posterolaterally with a row of longitudinal ridges (lr) (Fig. 4G). The new species closely resembles A. borgulai sp. nov. but shows a less pronounced sternum ornamentation (Fig. 1F), a different surface structure of the sternum setae (much less plumose, surface almost smooth; Fig. 2A) and more openings on the pleura (pl) surface (Fig. 2B); in males conical bulge (cb) on bulb less pronounced, cymbium anteriorly rounded in dorsal view, embolus subdistally without bend, embolic spine (esp) with pointed tip (Figs. 4 D–E); in females postepigastric lateral apodemes (lap) shorter, internal genitalia slightly different e.g. showing different distribution of papillae (pa) (Figs. 4 F–G); also differs in body size without overlap and has a disjunct distribution (Fig. 49).
Description. Description based on 9 males and 7 females.
MALE. With the characters of the genus except as noted. Body length 1.47–1.61 mm (n=8), carapace length 0.68–0.73 mm (n=8). Sclerotized parts uniformly coloured orange-brown, approaching colour 340 ‘Robin Rufous’; legs slightly paler than body. Habitus: Figs. 1 A–C.
CEPHALOTHORAX. Carapace: surface of elevated portion of pars cephalica smooth, sides strongly reticulate partly interrupted by small smooth areas (Figs. 1D, G); posterolateral surface without spikes; posterior edge of pars cephalica with slightly stronger modified hair bases (pmh), appearing as small pointed denticles (Fig. 1G); nonmarginal pars thoracica setae present; carapace margin with sluice (slu) restricted to posterior margin, with blunt denticles (Figs. 1 D–E, 2B). Eyes: posterior eye-row straight from above, procurved from front (Figs. 1D, H); ALE largest, separated by their radius to diameter; ALE-PLE separated by less than ALE radius; PME touching throughout most of their length; PLE-PME separated by less than PME radius. Sternum coarsely ornamented except smooth median stripe (Figs. 1 E–F); surface setae only slightly plumose (surface almost smooth; Fig. 2A); infracoxal grooves (icg) anteriorly and posteriorly with openings (Fig. 2B); posterior margin with broad single extension, covered with blunt denticles (Fig. 1F). Pleura (pl) surface smooth with scattered pits (Fig. 2B). Mouthparts: chelicerae posterior margin of inner surface along proximal half upfolded to a ridge with median slit (sli) (Fig. 2C); promargin with row of flattened setae (rfs) in combination with plumose setae, distally extending into a short inwards pointing tooth-like projection (tlp) (Figs. 1F, 2C); posterior face medially densely ribbed, with a pair of long spatulate setae (sps) (Fig. 2C). Endites: inner margin distally with brush of special wing-like setae (ws) with broad and deeply fringed tips (Fig. 2D), outer margin subdistally with a pair of rather long plumose setae bent inwards (ebs) (Fig. 2D).
ABDOMEN. Book lung covers (bc) large, elliptical to dumbbell or pear-shaped (i.e. sides concave), about 3 times longer than wide (Fig. 2G); book lung cover margins slightly elevated (Fig. 2H). Epigastric scutum dorsally with a widely oval subterminal ridge (sr) (Fig. 2G); scuto-pedicel region with slightly swollen hair bases (Fig. 2H). Postepigastric scutum long, semicircular, with long posteriorly directed lateral apodemes (lap) (Fig. 2E). Setae appearing slightly plumose at SEM level (Fig. 2H).
GENITALIA. Epigastric region: sperm pore (sp) situated at level of posterior spiracles (Fig. 2E). Palp: basal segments as well as bulb and cymbium lighter in colour than rest of body; bulb stout (Figs. 4 A–B). Embolus (em) medially with longitudinal ridges (lri) on prolateral surface (Fig. 4D), tip widened and spatulate (Fig. 4E); embolic spine with pointed tip (esp) (Fig. 4E). Conductor (con) with broad tip (on stereomicroscope level tip appears ‘snout’-like in lateral view; Figs. 4C, E). Embolus-conductor-complex about as long as bulb (Figs. 4 A–B).
FEMALE. As in male except as noted. Body length 1.46–1.77 mm (n=6), carapace length 0.67–0.77 mm (n=6). Book lung covers about 4–5 times as long as wide. Epigastric scutum posterolaterally with a row of longitudinal ridges (lr) (Figs. 4 F–G). Postepigastric scutum with short posteriorly directed lateral apodemes (lap) (Figs. 2F, 4 F–G).
GENITALIA. Dorsal view (Figs. 4 F–G): receptaculum (re) large, oval, containing an oval sac-like structure (sa), lateral and median part dorsally covered with papillae (pap), laterally framed by elongated, posteriorly pointed sclerites (apodemes, lap); globular appendix (gap) lying dorsally of receptaculum about 1/5 as long as receptaculum; a transverse sclerite (tsc) lies anteriorly to the receptaculum and bears medially a nail-like structure (na).
Intraspecific variation. Body size variable (see above); the following characters show slight variation: body colour, number of denticles on carapace margin and extension of smooth median stripe on sternum. One female (PBI_OON 00031362) large (body length 1.79 mm, carapace length 0.81 mm; not included in size measurements above), in dorsal view with rather broad carapace and posterior edge of pars cephalica with a pair of large blunt denticles.
Distribution. E-Kalimantan, INDONESIA (Fig. 49).
description: Published as part of THOMA, MARCO, KRANZ-BALTENSPERGER, YVONNE, KROPF, CHRISTIAN, GRABER, WERNER, NENTWIG, WOLFGANG & FRICK, HOLGER, 2014, The new Southeast Asian goblin spider genus Aposphragisma (Araneae, Oonopidae): diversity and phylogeny, pp. 1-86 in Zootaxa 3798 (1) on pages 9-15, DOI: 10.11646/zootaxa.3798.1.1, http://zenodo.org/record/4431865