Lineacoelotes longicephalus, Xu, Xiang, Li, Shuqiang & Wang, Xin-Ping, 2008

Xu, Xiang, Li, Shuqiang & Wang, Xin-Ping, 2008, Lineacoelotes, a new genus of Coelotinae from China (Araneae: Amaurobiidae), Zootaxa 1700, pp. 1-20 : 9-11

Lineacoelotes longicephalus sp. nov.

Figs 11–24 , 39

Type material: Holotype female, 3 female and 4 male paratypes from Bao-guang monastery, Chengdu (30.8°N, 104.1°E), Sichuan, China, May 21, 1989, P. Beron, deposited in AMNH.

Etymology: The specific name refers to the strongly elongated spermathecal heads (Latin: longus=long, Greek: cephalon=head); noun in apposition.

Diagnosis: Females of this species can be easily distinguished from those of other species of Lineacoelotes gen. nov. by the unique spermathecal heads, which originating ventrally from spermathecae (with basal part covered by spermathecae and copulatory ducts, in dorsal view), extending laterally, running anteriorly on the ventral and lateral sides of the copulatory ducts, and then converging medially and anteriorly ( Fig. 12 ). Males can also be easily distinguished from those of other species of Lineacoelotes gen. nov. by the large, prolaterally extending apophysis of conductor dorsal edge ( Fig. 14 ).

Description: Female holotype: Total length 8.17 ( Fig. 16 ). Prosoma 3.17 long, 2.31 wide; opisthosoma 5.00 long, 3.35 wide. Eye measurements: AME 0.12, ALE 0.19, PME 0.16, PLE 0.16; AME-AME 0.09, PME-PME 0.13, PME-PLE 0.14 ( Fig. 17 ). Chelicera with 3 promarginal and 2 retromarginal teeth ( Fig. 18 ). Leg formula: IV, I, II, III; leg measurements: I: 11.0 (3.0, 3.8, 2.5, 1.7); II: 9.3 (2.7, 3.0, 2.1, 1.5); III: 8.9 (2.5, 2.8, 2.3, 1.3); IV: 11.6 (3.2, 3.6, 3.3, 1.5). Epigynum with two long, strong teeth which originate from anterior margin of atrium, separated by approximately 1.5 times their basal width; atrium narrow, transversely extended, separated from epigastric furrow by approximately 1.5 times its length; epigynal teeth reaching almost the posterior margin of atrium; copulatory ducts distinct, large, originating anteriorly, extending laterally and posteriorly; spermathecal heads originating from ventral side of spermathecae, with basal part invisible from dorsal view; spermathecal heads extending to lateral sides of copulatory ducts, curving anteriorly, and then converging medially and anteriorly; spermathecae small, oval, close together ( Figs 11–12 ).

Male (one paratype): Total length 8.39. Prosoma 3.92 long, 2.70 wide; opisthosoma 4.47 long, 2.69 wide. Eye measurements: AME 0.12, ALE 0.18, PME 0.17, PLE 0.19; AME-AME 0.08, PME-PME 0.09, PME- PLE 0.13. Chelicera with 3 promarginal and 2 retromarginal teeth. Leg formula: IV, I, II, III; leg measurements: I: 14.7 (3.8, 4.9, 3.6, 2.4); II: 12.4 (3.5, 4.1, 2.9, 1.9); III: 11.9 (3.2, 3.6, 3.2, 1.9); IV: 15.8 (4.1, 4.8, 4.6, 2.3). Palpal patellar apophysis long, with more or less sharp distal end; RTA extending along most of tibial length, with pointed distal end; cymbial furrow approximately half of cymbial length; conductor distinctly separated into broad, short ventral apophysis (C1) and strongly modified dorsal edge; in addition to slender, strongly spiral distal apophysis (C2) on retrolateral side of conductor dorsal edge, another large, prolaterally directed apophysis (C3) being situated on conductor dorsal edge; median apophysis spoon-shaped, rounded; embolic base originating more or less proximally from tegulum, extending distally; embolus moderately long, filiform ( Figs 13–15 ).

Distribution: China (Sichuan) ( Fig. 39 ).

Figures

FIGURE 39. Records of species of Lineacoelotes gen. nov.

FIGURES 11 – 13. Lineacoelotes longicephalus sp. nov., female holotype and male paratype from Xindu, Sichuan, China. 11 Female epigynum, ventral view. 12 Female epigynum, dorsal view. 13 Male palp, prolateral view.

FIGURES 14 – 15. Lineacoelotes longicephalus sp. nov., male paratype from Xindu, Sichuan, China, palp (14. Ve n tr a l view; 15. Retrolateral view).

FIGURES 16 – 18. Lineacoelotes longicephalus sp. nov., female holotype from Xindu, Sichuan, China. 16 Habitus. 17 Eyes, dorsal view. 18. Chelicerae, ventral view.

FIGURES 19 – 22. Lineacoelotes longicephalus sp. nov., female paratype from Xindu, Sichuan, China. 19 Anterior lateral spinneret. 20 Posterior median spinneret. 21 Posterior lateral spinneret. 22 Tarsal organ.

FIGURES 23 – 24. Lineacoelotes longicephalus sp. nov., female paratype from Xindu, Sichuan, China. 23 Colulus, represented by two clusters of setae (indicated by two arrows). 24 Trichobothrium base, tarsus of leg 4 (hair is absent).