Opopaea semilunata, Tong, Yanfeng & Li, Shuqiang, 2015

Tong, Yanfeng & Li, Shuqiang, 2015, Six new species of the genus Opopaea Simon, 1891 from Xishuangbanna Rainforest, southwestern China (Araneae: Oonopidae), Zootaxa 3931 (1), pp. 41-62 : 55

Opopaea semilunata sp. nov.

( Figures 11 , 12 A, B, G, H)

Type material. Holotype: female ( IZCAS Ar-25042), China: Yunnan Province, Mengla County, Menglun Town, XTBG, Paramichelia baillonii plantation (21º54.200′N, 101º16. 923′E, Alt: 608 m), pitfall traps, 1–15 February 2007, leg. G. Zheng. Paratypes: 1 female ( IZCAS Ar-25043), same data as holotype, 1–15 July 2007; 1 female ( IZCAS Ar-25044), same data as holotype, 16–31 April 2007; 2 females ( IZCAS Ar-25045), same data as holotype, 1–9 November 2006; 1 female ( IZCAS Ar-25033), same data as holotype; 1 female ( IZCAS Ar-25034), same data as holotype; 1 female ( IZCAS Ar-25035), same data as holotype; 1 female ( IZCAS Ar-25036), same data as holotype; 1 female ( IZCAS Ar-25037), same data as holotype; 1 female ( IZCAS Ar-25039), same data as holotype, 1–9 July 2006; 1 female ( IZCAS Ar-25040), same data as holotype; 1 female ( IZCAS Ar-25041), same data as holotype; 1 female ( IZCAS Ar-25038), same data as holotype.

Etymology. The specific name “ semilunata ” is a Latin adjective, meaning half-moon shaped, referring to the shape of postgynum depression in females.

Diagnosis. The new species is similar to O. striata Baehr, 2013 , but can be distinguished by the absence of dorsolateral, triangular extensions on scuto-pedicel region (compare Fig. 11 H and Baehr et al. 2013: Fig. 26E), and by a long median triangular extension (lte) in female genital area (compare Fig. 12 G and Baehr et al. 2013: Fig. 26F).

Description. Female (holotype). Reddish brown species with yellow legs. Body length 1.55; carapace 0.63 long, 0.54 wide; abdomen 0.92 long, 0.72 wide. Habitus as in Fig. 11 A, B. Carapace: broadly oval in dorsal view, sides with longitudinal streaks; dorsal area smooth with some hairs at lateral edges; pars cephalica slightly elevated in lateral view ( Fig. 11 D); lateral margin rebordered. Eyes: six, well developed, ALE and PME nearly equal sized, PLE smallest; posterior eye row straight from above, procurved from front; ALE separated by more than their radius, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius. Clypeus margin unmodified; clypeus height about 1.5 times ALE diameter ( Fig. 11 F). Sternum as long as wide, uniform, fused to carapace; radial furrows present between coxae I- II, II-III, III-IV, with rows of small pits; surface smooth, without pits, microsculpture only in furrows ( Fig. 11 E). Anterior end of endites unmodified. Legs short, thick and spineless. Abdomen: dorsal scutum strongly sclerotized, punctate, covering full length of abdomen. Book lung covers small, ovoid, without setae. Pedicel tube short, ribbed, without small, dorsolateral, triangular extensions, scuto-pedicel region higher than diameter of pedicel, with nearly straight scutal ridges ( Fig. 11 H), scutum not extending far dorsal of pedicel. Posterior spiracles connected by groove ( Fig. 11 G); posteriorly directed apodemes present. Genitalia ( Fig. 12 A, B, G, H): in ventral view with a long median triangular extension (lte) and a large, semicircular postgynum depression; in dorsal view paddle-like sclerite (pls) with thin straight arms bent at end; nail-like process (nlp) small; globular appendix (ga) small.

Male. Unknown.

Distribution. Known only from the type locality.

Figures

FIGURE 11. Opopaea semilunata sp. nov., female. A, B. Habitus, dorsal and lateral views; C – F. Prosoma, dorsal, lateral, ventral and anterior views; G, H. Abdomen, ventral and anterior views. Abbreviations: boc = booklung covers; sr = scutal ridge. Scales: 0.2 mm.

FIGURE 12. Opopaea semilunata sp. nov. (A, B, G, H); Opopaea flabellata sp. nov. (C, D, I, J); Opopaea rigidula sp. nov. (E, F, K, L). A, C, E, G, I, K. Female genitalia, ventral views; B, D, F, H, J, L. Same, dorsal views; Abbreviations: apo = apodeme; asr = anterior scutal ridge; fse = fan-shaped extension; ga = globular appendix; lte = long median triangular extension; nlp = nail-like process; pd = postgynum depression; pls = paddle-like sclerite; psr = posterior scutal ridge; smk = small median knob. Scales: 0.1 mm.