Opopaea zhigangi 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 zhigangi Tong & Li sp. nov. Figures 4 , 5 , 6 , 7D-F

Type material.

Holotype: ♂ (IZCAS Ar-25105), sifting leaf litter, Myanmar, Chin, near 1.5 km of the roadside between Kanpetlet and Nat Ma Taung National Park, 011-012, 21°13.058'N, 93°59.033'E, 2421 m, 1.V.2017, Wu J & Chen Z. Paratype: 1♀ (IZCAS Ar-25106), same data as holotype.

Etymology.

The specific name is after Mr Zhigang Chen, one of the collectors of this species; noun (name) in genitive case.

Diagnosis.

The new species is similar to Opopaea deserticola Simon, 1892, but can be distinguished by the longer palpal patella (the ratio of width to length about 0.5) and slender cymbiobulbus (the ratio of width to length about 0.35) of male (Figs 4J-L , 5 ) and very small postgynal depression of female (Fig. 7E ). The male of O. deserticola has relatively shorter palpal patella (the ratio of width to length about 0.65) and expanded cymbiobulbus (the ratio of width to length about 0.47) and the female has a relatively larger postgynal depression ( Platnick and Dupérré 2009: figs 55-66).

Description.

Male (holotype). Measurements: TL: 1.54; CL: 0.60; CW: 0.58; AL: 0.98; AW: 0.70; ALE: 0.08; PME: 0.07; PLE: 0.07; EGW: 0.22; ALE-ALE: 0.02; ALE-PLE: 0.01; PME-PME: 0; PLE-PME: 0; CBL: 0.31; CBW: 0.11; PTL: 0.41; FI: 0.21; FML: 0.14. Coloration: legs yellow, carapace and abdomen scuta brown, abdominal interscutal areas creamy white, booklung covers reddish, pedipalps reddish brown. Habitus as in Fig. 4A, C, E . Carapace (Fig. 4B, F ): wide oval in dorsal view; sides with longitudinal streaks; median area smooth with some setae at lateral edges. Eyes (Fig. 4B, G ): ALE largest, PLE smallest; posterior eye row recurved viewed from above, procurved from front; ALE almost touching, 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 1.7 times ALE diameter (Fig. 4G ). Sternum (Fig. 4D ) 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 small, sharply pointed projection. Abdomen: booklung covers very small, reddish brown, ovoid, without setae. Pedicel tube short, ribbed, with small, dorsolateral, triangular extensions, scuto-pedicel region lower than pedicel diameter, with arched scutal ridges, with curved anterior scutal ridge (Fig. 4H, I ). Palp (Figs 4J-L , 5 ): femur slightly shorter than half length of patella and submedially inserted to patella; patella very large; tibia small, rounded; cymbiobulbus shorter than the patella; fenestra large slit-like, located at nearly tip of cymbiobulbus. Tip of embolus broad triangle.

Female (n = 1). As in male except as noted. Measurements: TL: 1.84; CL: 0.65; CW: 0.58; AL: 1.18; AW: 0.87; ALE: 0.09; PME: 0.07; PLE: 0.06; EGW: 0.21; ALE-ALE: 0.02; ALE-PLE: 0.01; PME-PME: 0; PLE-PME: 0. Habitus as in Fig. 6A, C, E . Endites without projections. Copulatory organ (Fig. 7D-F ): postgynal depression (pd) very small; dorsally with nail-like process (nlp) connected to paddle-like sclerite (pls) bearing thick, straight arms.

Distribution.

Known only from the type locality.

Figures

Figure 4. Opopaea zhigangi 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, prolatral, retrolateral and dorsal views. Abbreviations: boc = booklung covers; dte = dorsolateral, triangular extensions; sr = scutal ridge. Scale bars: 0.4 mm.

Figure 5. Opopaea zhigangi 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 6. Opopaea zhigangi sp. nov., female (IZCAS Ar- 25106) 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.