Opopaea kanpetlet Tong & Li, 2020

Tong, Yanfeng, Chen, Zengliang & Li, Shuqiang, 2020, Two new species of the genus Opopaea (Araneae, Oonopidae) from Myanmar, ZooKeys 917, pp. 51-61 : 51

Opopaea kanpetlet Tong & Li sp. nov. Figures 1 , 2 , 3 , 7A-C

Type material.

Holotype: ♂ (IZCAS Ar-25098), sifting leaf litter, Myanmar, Chin, Roadside between Kanpetlet and Nat Ma Taung National Park, 003, 21°13.325'N, 93°55.739'E, 2942 m, 30.IV.2017, Wu J & Chen Z. Paratypes: 2♀ (IZCAS Ar-25099, 25100), same data as holotype; 1♂ (IZCAS Ar-25101), 3♀ (IZCAS Ar-25102, 25103, 25104), sifting leaf litter, Myanmar, Chin, near 16.5 km of the roadside between Kanpetlet and Nat Ma Taung National Park, 002, 21°13.195'N, 93°16.125'E, 2789 m, 30.IV.2017, Wu J & Chen Z.

Etymology.

The specific name is a noun in apposition taken from the type locality.

Diagnosis.

The new species is similar to Opopaea tumida Tong & Li, 2013, but can be distinguished by the small booklung covers (Fig. 1I ), the acute tip of male palpal bulb (Figs 1J-L , 2 ) and the posterior scutal ridge of the female (Fig. 7A-C ). The male of O. tumida has large booklung covers, a small apophysis in the retrolateral distal region of the palpal bulb, and the female is lacking the posterior scutal ridge ( Tong and Li 2013: figs 8I, 9I, J, 10D).

Description.

Male (holotype). Measurements: TL: 1.63; CL: 0.68; CW: 0.58; AL: 0.91; AW: 0.69; ALE: 0.08; PME: 0.07; PLE: 0.06; EGW: 0.23; ALE-ALE: 0.04; ALE-PLE: 0.01; PME-PME: 0; PLE-PME: 0; CBL: 0.23; CBW: 0.08; PTL: 0.33; FI: 0.16; FML: 0.13. Coloration: legs yellow, carapace and abdomen scuta yellow brown, abdominal interscutal areas creamy white, booklung covers light yellow, pedipalps reddish brown. Habitus as in Fig. 1A, C, E . Carapace (Fig. 1B, F ): wide oval in dorsal view; sides with longitudinal streaks; median area smooth with rows of setae at lateral edges. Eyes (Fig. 1B, G ): ALE largest, PLE smallest; posterior eye row recurved viewed 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 height about 1.1 times ALE diameter (Fig. 1G ). Sternum (Fig. 1D ) longer than wide, fused to carapace; surface smooth; radial furrows present between coxae I-II, II-III, III-IV, with rows of small pits. Endites anteriorly with a small, sharply pointed projection. Abdomen: booklung covers very small, ovoid, without setae. Pedicel tube short, ribbed, with small, dorsolateral triangular extensions, scuto-pedicel region lower than pedicel diameter, with arched scutal ridges, interrupted medially, with curved anterior scutal ridge (Fig. 1H, I ). Palp (Figs 1J-L , 2 ): femur slightly shorter than half length of patella and submedially attached to patella; patella strongly enlarged, elongate oval; tibia small, rounded; cymbiobulbus shorter than the patella; palpal fenestra small oval and located nearly at tip of cymbiobulbus. Tip of embolus acute triangle.

Female (n = 5). As in male except as noted. Measurements (IZCAS Ar-25099): TL: 1.89; CL: 0.70; CW: 0.61; AL: 1.27; AW: 0.75; ALE: 0.08; PME: 0.06; PLE: 0.05; EGW: 0.21; ALE-ALE: 0.03; ALE-PLE: 0.01; PME-PME: 0; PLE-PME: 0. Palp light yellow. Habitus as in Fig. 3A, C, E . Endites without projections. Copulatory organ (Fig. 7A-C ): posterior margin of epigastric scutal ridge (asr) smooth, thick posterior scutal ridge (psr) adjacent to asr, small postgynal semicircular depression (pd) between asr and psr; dorsally with nail-like process (nlp) connected to paddle-like sclerite (pls) bearing thin, straight arms.

Distribution.

Known only from the type locality.

Figures

Figure 1. Opopaea kanpetlet sp. nov., male holotype A, C, E habitus, dorsal, ventral and lateral views B, D, F, G prosoma, dorsal, ventral, lateral and anterior views H, I abdomen, anterior and ventral views J, K, L left palp, prolateral, retrolateral and dorsal views. Abbreviations: boc = booklung covers; dte = dorsolateral, triangular extensions; sr = scutal ridge. Scale bars: 0.4 mm (A-I); 0.2 mm (J-L).

Figure 2. Opopaea kanpetlet sp. nov., holotype, left male palp, SEM A, B prolateral and retrolateral views C, D, G cymbiobulbus, prolateral, retrolateral and dorsal views E, F, H distal part of cymbiobulbus, prolateral, retrolateral and dorsal views. Abbreviations: cb = cymbiobulbus; fm = femur; fn = fenestra; pt = patella.

Figure 3. Opopaea kanpetlet sp. nov., female (IZCAS Ar- 25099) A, C, E habitus, dorsal, ventral and lateral views B, D, F prosoma, dorsal, ventral and lateral views. Scale bars: 0.4 mm.

Figure 7. Female copulatory organ A-C Opopaea kanpetlet sp. nov. (IZCAS Ar- 25099) D-F Opopaea zhigangi sp. nov. (IZCAS Ar- 25106) A, B, D, E ventral view C, F dorsal view. Abbreviations: apo = apodeme; asr = anterior scutal ridge; ga = globular appendix; nlp = nail-like process; pd = postgynal depression; pls = paddle-like sclerite; psr = posterior scutal ridge. Scale bars: 0.1 mm.