Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006

Yu, Kun & Zhang, Zhi-Sheng, 2018, On three species of the trapdoor spider Genus Cyclocosmia from China (Araneae, Halonoproctidae), Zootaxa 4532 (2), pp. 248-256 : 249-250

Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006 (Îḃflnff)

Figures 1A – G , 2A – D , 7A , 8A , 9B – G

Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006: 119 , figs 4, 5A – D, 6A – J (Holotype female from Guangxi, China, deposited in MHBU, not examined).

Material examined. CHINA. 2 females and 1 male, Border area of China and Vietnam (no detail locality), Guangxi Zhuang Autonomous Region , 8 May 2015 (male matured on 29 June 2015) ( SWUC) ; 2 females, the same locality as above, 8 May 2015 (males matured on 10 July 2015) (SWUC).

Diagnosis. The anterior spermatheca of the species is nearly quadrate, without protuberance, different from the American species: C. truncata ( Gertsch & Platnick 1975: 6, fig. 25), C. torreya ( Gertsch & Platnick 1975: 12, fig. 26) and C. loricata ( Gertsch & Platnick 1975: 15, fig. 27). Males and females are similar to those of other Asian Cyclocosmia species in having the similar shape of spermatheca ( Figs 1F , 2D ), especially C. siamensis ( Schwendinger 2005: 231, figs 17 – 21), but are distinguished by the upper muscle impression of the opisthosomal disc with a pair of endocentric concavities ( Figs 1G , 8A ).

Description. Female ( Figs 1F – G , 2D , 9 B–D, 9F–G). See also Zhu, Zhang & Zhang (2006: 121, figs 4, 5A – D, 6A – J).

Abdomen of female yellow-brown, with opisthosomal disc bearing 40–54 ribs. Spermathecae twice as long as wide (L/W=2.27), without protuberance.

Male ( Figs 1 A–E, 2A–C, 7A, 8A, 9E; described for the first time). Total length (including chelicerae) 19.79 – 21.47; chelicerae 2.32, carapace 9.01 long, 8.41 wide; abdomen 10.14 long, 8.34 wide. Carapace and chelicerae brownish black. Chelicerae short, broad, with spinose rastellum on both paturons. Abdomen with opisthosomal disc, pattern on opisthosomal disc of male similar to that of female, with 48 ribs in total. Eight eyes concentrated on low tubercle. Ocular area 1.03 long; anterior width, 2.24; posterior width, 2.32; ALE: AME: PLE: PME (0.56: 0.37: 0.47: 0.31), ALE – AME 0.27, AME – AME 0.27, PLE – PME 0.14, PME – PME 0.97; MOA 0.96 long, front width 1.01, back width 1.49. Clypeus height 0.96. Maxilla 1.43 long, 1.76 wide. Sternum 5.21 long, 5.31 wide. Legs brown and yellow, longer than female. Leg measurements: I 26.27 (8.62, 2.42, 6.46, 5.85, 2.92); II 22.11 (8.26, 2.11, 4.47, 4.62, 2.65); III 21.75 (6.32, 2.57, 4.51, 5.06, 3.29); IV 28.33 (8.06, 3.92, 5.34, 7.28, 3.73). Leg formula: 4123. Tibia width (2.09: 1.90: 2.26: 2.53).

Male pedipalp sclerotized. Embolus long. Copulatory duct smooth, without protuberance.

Distribution. China (Guangxi, Yunnan) and Vietnam (Vinh Phuc, Ninh Binh).

Figures

FIGURE 1A–G. Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006, male (A–E) and female (F–G). A. Male habitus, dorsal view. B. Same, ventral view. C. Left male pedipalp, prolateral view. D. Same, ventral view. E. Same, retrolateral view. F. Female vulva, dorsal view. G. Opisthosomal disc of female, caudal view.

FIGURE 2A–D. Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006. A. Left male pedipalp, prolateral view. B. Same, ventral view. C. Same, retrolateral view. D. Female vulva, dorsal view.

FIGURE 7A–C. Dorsal view of male, eyes. A. Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006. B. Cyclocosmia sublatusicosta sp. nov. C. Cyclocosmia subricketti sp. nov.

FIGURE 8A–C. Caudal view of male opisthosomal discs. A. Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006. B. Cyclocosmia subricketti sp. nov.. C. Cyclocosmia sublatusicosta sp. nov.

FIGURE 9A–G. Habitus and biological photos. A. Male of Cyclocosmia subricketti sp. nov. (freshly dead beside trap), caudal view. B. Adult female of Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006, dorsal view. C. Burrow of C. latusicosta in aquarium. D. Female C. latusicosta preying on Tenebrio larva. E. Subadult male of C. latusicosta, showing bulbed pedipalpal cymbium. F. Female C. latusicosta waiting for prey. G. Subadult C. latusicosta preying on cockroach (A, photographed by Lu- Yu Wang. C–G, photographed by Ye-Jie Lin).