Opopaea tumida, Tong, Yanfeng & Li, Shuqiang, 2013

Tong, Yanfeng & Li, Shuqiang, 2013, Six new species of oonopid spiders from Champasak, Laos (Araneae, Oonopidae), Zootaxa 3709 (1), pp. 71-88 : 78-85

Opopaea tumida sp. nov.

Figures 8–10

Type material: Holotype: Male ( IZCAS AR 19392), Laos, Champasak Province, Tad Etu, Holiday Village, 15º11.527'N, 106º06.204'E, elevation 889 meters, November 18, 2012, leg. S. Li. Paratypes: 2 females ( IZCAS AR 19390), Laos, Champasak Province, Tad Fane Resort, 15º10.944'N, 106º07.606'E, elevation 955 meters, November 21, 2012, leg. S. Li; 1 male ( IZCAS AR 19412), Laos, Champasak Province, Tad Etu, Unnamed Waterfall near Holiday Village, 15º11.639'N, 106º06.222'E, elevation 909 meters, November 19, 2012, leg. S. Li; 1 female ( IZCAS AR 19413), Laos, Champasak Province, Tad Fane Resort, 15º10.944'N, 106º07.606'E, elevation 955 meters, November 21, 2012, leg. S. Li.

Etymology: The specific name means “bulgy” in Latin, and refers to the small apophysis in the retrolateral distal region of the male palp; adjective.

Diagnosis: The new species is similar to O. speighti Baehr, 2011 , but can be distinguished by the small apophysis in the retrolateral distal region of the male palpal bulb, and the absence of the narrow, triangular, posteriorly directed extension in the female genital region

Description: Male (holotype). Yellowish brown species with yellow legs. Body length 1.69; carapace 0.71 length, 0.54 width; abdomen 0.96 length, 0.56 width. Habitus as in Figs 8 A, B. Carapace: sides with longitudinal streaks; dorsal area smooth with some hairs at lateral edges; pars cephalica flat in lateral view ( Figs 8 C, D). Eyes: six, well developed, ALE largest, PLE smallest; posterior eye row straight from above, procurved from front; ALE separated by less 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 1.2 times of ALE diameter ( Fig. 8 E). Sternum longer than 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. Anterior end of endites with a small, sharply pointed projection ( Fig. 8 H). Legs short, thick and spineless.

Abdomen: dorsal scutum strongly sclerotized, punctate, covering full length of abdomen. Book lung covers middle sized, ovoid, without setae. Pedicel tube short, ribbed, with small, dorsolateral, triangular extensions, scuto-pedicel region with paired curved scutal ridges ( Fig. 8 G), scutum not extending far dorsal of pedicel. Sperm pore small, transverse; posterior spiracles connected by groove ( Fig. 8 I); posteriorly directed apodemes present. Colulus very small, with two short setae; spinneret scutum present, incomplete ring. Supra-anal scutum absent. Palp: patella greatly enlarged and swollen, attached to femur submedially; cymbium completely fused to bulb, no seam visible; bulb with a small apophysis (sap) in the retrolateral distal region ( Figs 10 A–E).

Female. As in male except as noted. Body length 1.65; carapace 0.73 length, 0.57 width; abdomen 1.01 length, 0.64 width. Habitus as in Figs 9 A, B. Endites without projection ( Fig. 9 H). Genitalia ( Figs 9 J, K, 10F, G): in the middle of the epigastric furrow is a small dark spot visible through cuticle; paddle-like sclerite (pls) with thin straight arms visible in dorsal view; nail-like process (nap) small, well separated; globular appendix (ga) separated into two parts, anterior part in two pieces, posterior part small, globular.

Distribution: Known only from the type locality.

Figures

FIGURE 8. Opopaea tumida sp. nov., male. A, B. Habitus, dorsal and lateral views; C – F, H. Prosoma, dorsal, lateral, anterior, posterior and ventral views; G, I. Abdomen, anterior and ventral views. Scales: A, B = 0.4 mm; C – I = 0.2 mm.

FIGURE 9. Opopaea tumida sp. nov., female. A, B. Habitus, dorsal and lateral views; C – F, H. Prosoma, dorsal, lateral, anterior, posterior and ventral views; G, I. Abdomen, anterior and ventral views; J, K. Genitalia, ventral and dorsal views. Scales: A, B = 0.4 mm; C – I = 0.2 mm; J, K = 0.1 mm.

FIGURE 10. Opopaea tumida sp. nov. A – E. Male left palp, prolateral (A, C), retrolateral (B, D) and dorsal (E) views; F, G. Female genitalia, ventral and dorsal views. Abbreviations: a, apodeme; ga, globular appendix; nlp, nail-like process; pls, paddle-like sclerite; sap, small apophysis. Scales: A, B = 0.2 mm; C – G = 0.1 mm.