Coelotes obtusangulus, Luo & Chen, 2015

Luo, Ying & Chen, Jian, 2015, Two new Coelotes species from China (Araneae: Agelenidae: Coelotinae), Zoological Systematics 40 (3), pp. 258-267 : 260-263

Coelotes obtusangulus sp. nov. ( Figs 1–14 , 29 )

Material examined. Holotype ♂, Tiantangzhai National Forest Park, Anhui Province, China, 28–29 September 2009, leg. Hai-Juan Xie and Xin Xu. Paratype 1♀, same data as holotype. All specimens are deposited in CBEE .

Etymology. The specific name is taken from the Latin adjective obtusangulus , meaning blunt, referring to the blunt end of male retrolateral tibial apophysis.

Diagnosis. This new species is similar to Coelotes tiantangensis sp. nov. in having a bifurcated patellar apophysis, the © Zoological Systematics, 40(3): 258–267

© Zoological Systematics, 40(3): 258–267 short cymbial furrow, the large, round median apophysis, the significantly curved conductor, the absence of dorsal aphophysis in males, the broad epigynal teeth with sharp tips, the short copulatory conducts, the ellipse-shaped spermathecae, the slender spermathecal heads situated anteriorly laterad of spermathecae in females, but can be distinguished from the latter by the following characters: 1). the patellar apophysis longer than patellar in C. obtusangulus sp. nov., but shorter in C. tiantangensis sp. nov. ( Figs 2 , 16 ); 2). RTA with distal end extending beyond tibia in C. obtusangulus sp. nov., but not in C. tiantangensis sp. nov. ( Figs 2 , 16 ); 3). the prolateral part of conductor narrow, less than half of tegular sclerite width in C. obtusangulus sp. nov., but slightly wider than tegular sclerite width in C. tiantangensis sp. nov. ( Figs 1 , 15 ); 4). the epigynal teeth separate in C. obtusangulus sp. nov., but closed with each other in C. tiantangensis sp. nov. ( Figs 4 , 18 ); 5). the copulatory ducts totally hidden by the spermathecae in C. obtusangulus sp. nov., but not in C. tiantangensis sp. nov. ( Figs 5 , 19 ). These two new species can be distinguished from other Coelotinae by the bifurcated patellar apophysis with ventral branch strongly larger than dorsal ( Coelotes mastrucatus (Wang et al.,1990) also having bifurcated patellar apophysis, but its ventral branch is much smaller than the dorsal) in the males ( Figs 1–3 , 6–8 , 15–17 , 20–22 ), by the combinations of the broad epigynal teeth with sharp tips, the short copulatory conducts, the ellipse-shaped spermathecae in the females ( Figs 4–5 , 9–10 , 18–19 , 23–24 ).

Description. Male (holotype). Total length 5.17. Prosoma 2.58 long, 1.80 wide; opisthosoma 2.38 long, 1.49 wide. Eye AME 0.06, ALE 0.12, PME 0.12, PLE 0.11, AME–AME 0.04, AME–ALE 0.04, ALE–PLE 0.03, PME–PME 0.07, PME–PLE 0.09. Leg formula, IV, I, II, III; leg, I 7.51 (2.11, 2.57, 1.75, 1.08); II 6.57 (1.89, 2.18, 1.56, 0.94); III 6.33 (1.88,

© Zoological Systematics, 40(3): 258–267 1.97, 1.71, 0.77); IV 9.04 (2.43, 2.89, 2.58, 1.14). Chelicerae with 3 promarginal and 2 retromarginal teeth. Patellar apophysis long, bifurcated; retolateral tibial apophysis large and broad, with a blunt distal end extending beyond tibia; lateral tibial apophysis small, slightly separated from retolateral tibial apophysis; cymbial furrow no more than half the length of the cymbium; conductor broad and complex, significantly curved, almost "L" shaped; conductor dorsal apophysis broad, with sharp end and leaf-like in the retrolateral view; median apophysis broad, round; embolus filiform, originating prolaterally ( Figs 1–3 , 6–8 , 11–12 ).

Female (paratype). Total length 5.39. Prosoma 2.71 long, 2.00 wide; opisthosoma 2.68 long, 1.70 wide. Eye AME 0.088, ALE 0.13, PME 0.14, PLE 0.13, AME–AME 0.04, AME–ALE 0.06, ALE–PLE 0.04, PME–PME 0.08, PME–PLE 0.11. Leg formula IV, I, II, III; leg I 7.80 (2.15, 2.65, 1.75, 1.25); II 6.70 (1.90, 2.30, 1.45, 1.05); III 5.35 (1.75, 2.10, 1.70, 1.05); IV 9.45 (2.35, 3.00, 2.55, 1.55). Chelicerae with 3 promarginal and 2 retromarginal teeth. Epigynal teeth lamella large and broad, slightly longer than wide, situated medially and laterally, widely separated; atrium small, situated posteriorly; copulatory ducts small, totally hidden by the spermathecae; spermathecae ellipse-shaped, close to each other; spermathecal heads short, originating from dosal side of spermathecal, situated anteriorly laterad of spermathecae ( Figs 4–5 , 9–10 , 13–14 ).

© Zoological Systematics, 40(3): 258–267 Distribution. China (Anhui) ( Fig 29 ).

Figures

Figs 1–2. Coelotes obtusangulus sp. nov., male, holotype. 1. Left male palp, prolateral view. 2. Ditto, retrolateral view. Scale bars= 0.2 mm. Abbreviations: C — conductor; CDA—conductor dorsal apophysis; CF — cymbial furrow; E— embolus; LTA— lateral tibial apophysis; MA— median apophysis; PA—patellar apophysis; RTA—retrolateral tibial apophysis; ST— subtegulum; T— tegulum; TS—tegular sclerite.

Figs 3–5. Coelotes obtusangulus sp. nov. 3. Left male palp, ventral view, holotype. 4. Epigynum, ventral view, female, paratype. 5. Vulva, dorsal view, female, paratype. Scale bars=0.2 mm. Abbreviations: A— atrium; C—conductor; CDA—conductor dorsal apophysis; E — embolus; ET —epigynal teeth; MA — median apophysis; PA — patellar apophysis; RTA — retrolateral tibial apophysis; S— spermathecae; SH—spermathecal head; TS— tegular sclerite.

Figs 6–10. Coelotes obtusangulus sp. nov. 6. Left male palp, prolatera view. 7. Ditto, retrolateral view. 8. Left male palp, ventral view, holotype. 9. Epigynum, ventral view, female, paratype. 10. Vulva, dorsal view, female, paratype. Scale bars=0.2mm.

Figs 11–14. Coelotes obtusangulus sp. nov. 11. Male habitus, dorsal view, holotype. 12. Ditto, ventral view. 13. Female habitus, dorsal view, paratype. 14. Ditto, ventral view. Scale bars=1mm.

Fig. 29. Loaction map of the Tiantangzhai National Forest Park.

Figs 15–16. Coelotes tiantangensis sp. nov., male, holotype. 15. Left male palp, prolateral view. 16. Ditto, retrolateral view. Scale bars = 0.2 mm. Abbreviations: C — conductor; CDA— conductor dorsal apophysis; CF — cymbial furrow; E — embolus; LTA— lateral tibial apophysis; MA—median apophysis; PA—patellar apophysis; RTA—retrolateral tibial apophysis; ST—subtegulum; T —tegulum; TS—tegular sclerite.

Figs 17–19. Coelotes tiantangensis sp. nov. 17. Left male palp, ventral view, holotype. 18. Epigynum, ventral view, female, paratype. 19. Vulva, dorsal, female, paratype. Scale bars = 0.2 mm. Abbreviations: A— atrium; C—conductor; CD— copulatory duct; E—embolus; ET— epigynal teeth; FD— fertilization duct; H —hood; MA—median apophysis; S— spermathecae; SH— spermathecal head; TS—tegular sclerite.

Figs 20–24. Coelotes tiantangensis sp. nov. 20. Left male palp, prolateral. 21. Ditto, retrolateral. 22. Left male palp, ventral view, holotype. 23. Epigynum, ventral view, female, paratype. 24. Vulva, dorsal view, female, paratype. Scale bars =0.2mm.