Hesperentomon bolense Qian & Bu & Luan 2018, sp. n.
Creators: name: Qian, Chang-Yuan
name: Bu, Yun
name: Luan, Yun-Xia
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Protura
Hesperentomidae
Hesperentomon
Hesperentomon bolense

description: Hesperentomon bolense sp. n.
Figs. 1‒27
Material examined. Holotype ♂ (No. BL 1705D), Northwest China, Xinjiang Uygur Autonomous Region, Bole, Bortala Mongol Autonomous Prefecture, extracted from a soil sample from dense birch forest, Hariturege National Forest Park, 44°57' N 81°54' E, elev. 599 m, 31‒VIII‒2016, coll. C.Y. Qian, C.W. Huang, A.M. Liu. Paratypes: 6 ♀ (nos. BL1701D, BL1702D, BL1703D, BL1704D, BL1707D, BL1708D), 1 ♂ (no. BL1706D), same data as holotype.
Diagnosis. Hesperentomon bolense sp. n. is characterized by having foretarsal sensillum b clearly shorter than c, and sensillum c broader than the other foretarsal sensilla; 18 posterior setae on mesonotum, 16 posterior setae on metanotum; 12 posterior setae on urotergites II‒VI (P1a and P2a absent), 8 posterior setae on urosternites IV‒VI (Pc absent), absence of setae P2a on urotergite VII; 4 and 6 anterior setae on mesosternum and metasternum respectively; 7‒9 teeth on comb.
Description. Adult body length 1,277‒1,322 µm (n = 8), body light brown, foretarsus darker (Fig. 1).
Head oblong, length 145‒155 µm, width 91‒102 µm. Dorsal setae long, other setae short. Setae sd4, d6 and sd6 present. Seta d 6 14‒15 µm, d7 9 µm in length. Paired pores cp, ip and op present, pore fp absent. Pseudoculus pear-shaped, with short posterior extension, length 15.6‒16.7 µm, width 6.7‒8.9 µm. PR = 9.3 (Figs. 2, 11). Canal of maxillary gland with sausage-like calyx, posterior dilation approximately equal to length of calyx (Fig. 12). CF = 10.6‒11.4. Maxillary palpus with two tapering sensilla, dorsal sensillum (8‒9 µm) distinctly longer than lateral sensillum (5‒6 µm) (Fig. 13). Labial palpus well developed, without basal sensillum (Fig. 14).
Foretarsus length 114 µm, claw length 25 µm, TR = 3.5; empodium length 9.1 µm, EU = 0.36. Dorsal sensillum t1 slender, pointed; t2 slender, pointed, longer than t1; t3 shorter than t1, blunt, slight widened; BS = 0.93; exterior sensilla filiform, c, d, e and g approximately parallel-sided, a slight broadened, pointed, shorter than t1; b slight broadened, blunt, same length as a, reaching base of d; c long and robust, broader than other sensilla; d 1.3 times longer than a, based nearer to e than to c; e robust, same length as d; f and g robust, f short, g same length as e. Interior sensillum a' blunt; b'-1 slender, pointed; b'-2 robust, shorter than b'-1; c'-2 reaching base of claw; c'-1 blunt and short. Relative length of sensilla: c'-1 <(f = b'-2) <(a = a' = t3 = b) <(b'-1 = c'-2) <(d = g = t1= e) <(c = t2). Foretarsus with two pores, near sensillum e and c (Figs. 15, 16).
Thoracic chaetotaxy given in Table 2. Setae 1 and 2 on pronotum subequal in length (Fig. 18); mesonotum with 2 pairs of anterior seta (A2, A4), and 9 pairs of posterior setae, lengths of setae P1a, P2a, P5a and P5a' on mesonotum 8.2, 12.7, 1.8 and 2.3 µm, respectively (Figs. 19, 20). Metanotum with 2 pairs of anterior seta (A2 and A4), and 8 pairs of posterior setae, without P5a' (Figs. 21, 22). Prosternum with anterior seta A1, A2 (Fig. 17); mesosternum (Fig. 20) and metasternum (Fig. 22) with 4 and 6 anterior setae respectively. All setae on thoracic sternites setiform.
Pronotum without pores, mesonotum (Fig. 19) and metanotum with pores sl (Fig. 21). Prosternum, mesosternum and metasternum each with single median pore sc, situated posterior to level of setae M on prosternum (Fig. 17) and mesosternum (Fig. 20), but anterior to level of setae M on metasternum (Fig. 22).
Abdominal chaetotaxy given in Table 2. Urotergite I with two pairs of anterior setae (A1, A2) and five pairs of posterior setae (Figs. 4, 5). Urotergites II‒VI with 4 pairs of anterior setae (A1, A2, A4, A5) (Fig. 7), six pairs of posterior seta, P1a and P2a absent, P4a present. Urotergite VII with 8 pairs of posterior seta, P1a, P3a and P4a present (Fig. 10). Urotergite I with pores al and psm (Fig. 5); urotergites II‒VII with pores al, psm and psl (Fig. 7), VIII with pore psm, IX‒XI without pores, XII with a pore (Fig. 26).
Posterior central seta Pc absent on urosternites IV‒VI (8 posterior setae) (Fig. 8), present on urosternite VII (Fig. 9). Bases of setae on segments X‒XII without surrounding ciliation (Fig. 26). Urosternites I‒VI each with one median pore spm (Figs. 4, 6, 8), VII with pores spm and spsl (Fig. 9), VIII and X each with single median pore (Fig. 27), IX with one median pore and one pair of lateral pores (Fig. 27), XI without pores, XII with two pairs of pores sam and sal (Fig. 27).
Abdominal appendages each with two segments and four setae. Striate band on abdominal segment VIII reduced, only a single serrate line present (Fig. 3). Comb on abdomen VIII rectangular, with 7‒9 teeth (Fig. 25). Female squama genitalis robust (Fig. 23). Male squama genitalis with 2+2 setae on dorsal side and 2 setae on ventral side (Fig. 24).
Distribution. China (Xinjiang).
Etymology. The specific name is derived from Bole City, where the holotype and paratypes were collected.
description: Published as part of Qian, Chang-Yuan, Bu, Yun & Luan, Yun-Xia, 2018, DNA barcoding and an updated key to the genus Hesperentomon (Protura: Acerentomata: Hesperentomidae), with a new species from Northwest China, pp. 523-534 in Zootaxa 4462 (4) on pages 525-529, DOI: 10.11646/zootaxa.4462.4.5, http://zenodo.org/record/1441827