Serendib Deeleman-Reinhold, 2001

Zhang, Lu & Zhang, Feng, 2023, Note on the genus Serendib Deeleman-Reinhold, 2001, with the description of a new species (Araneae, Corinnidae, Castianeirinae), Biodiversity Data Journal 11, pp. 99980-99980 : 99980

Serendib Deeleman-Reinhold, 2001

Serendib Serendib volans Deeleman-Reinhold, 2001

Description

Small spiders, 4-6 mm in length. Carapace wedge-shaped or elongated, smooth or with plumose hairs; several long setae on clypeus and eye region; broadest of carapace at coxae Ⅱ-Ⅲ (Fig. 7 a); anterior eye row slightly recurved in dorsal view and posterior eye row very wide and strongly recurved (Fig. 1 a); fovea short, longitudinal, indistinct. Chelicerae same colour as carapace, both promargin and retromargin with two teeth. Sternum about as broad as long, slightly narrowed posteriorly. Leg formula 4123; femora Ⅰ-Ⅱ with one row of long bristles ventrally (usually four or eight), femora Ⅲ-Ⅳ with one or two long bristles ventrally (Fig. 3). Abdomen round or oval in females, elongate oval in males; with short or long grooved collar (Fig. 1 b-d); anterior with one or two pairs of strongly erected spines (Fig. 2); dorsal scutum strongly sclerotized (Fig. 7 a).

Palpal tibia longer than wide, with retrolateral hump and small RTA. Subtegulum visible in retrolateral view. Sperm duct coiled and formed loops, anterior with extra transverse U-shaped loop in S. hispida sp. n. and S. suthepica . Embolus with distinctly narrowed tip (Fig. 8 a-d and fig. 517 in Deeleman-Reinhold (2001)).

Epigyne simple and strongly sclerotized. Copulatory openings posteriorly situated, with simple sclerotized margins. Copulatory ducts gradually extended into anterior spermathecae. Posterior spermathecae separated or contiguous (Fig. 4 c-d; Fig. 6 c-d; Fig. 8 e-f).

Diagnosis

All species of Serendib resemble those of Sphecotypus O. Pickard-Cambridge, 1895 and Aetius O. Pickard-Cambridge, 1897 in ant-mimicking, small body size and having wide, strongly recurved posterior eye row (Fig. 1 a), but can be distinguished by the following characters: 1) abdomen without transverse constriction (Fig. 4 a-b; Fig. 6 a-b; Fig. 7 a, c); 2) anterior abdomen with one or two pairs of strongly erected spines (Fig. 2); 3) femora Ⅰ-Ⅱ with one row of long bristles ventrally (usually four or eight), femora Ⅲ-Ⅳ with one or two long bristles ventrally (Fig. 3); 4) copulatory duct long, curved or spiral (Fig. 4 d; Fig. 6 d; Fig. 8 f).

Distribution

China, Indonesia, Laos, Malaysia, Thailand (Fig. 9 ).

Figures

Figure 4. Serendib volans Deeleman-Reinhold, 2001: a female habitus, dorsal view; b same, ventral view; c epigyne, ventral view; d vulva, dorsal view. Abbreviations: CO-copulatory opening; CD-copulatory duct; FD-fertilization duct; S-spermatheca. Scale bars: 1 mm (a-b); 0.1 mm (c-d).

Figure 6. Serendib suthepica Deeleman-Reinhold, 2001: a female habitus, dorsal view; b same, ventral view; c epigyne, ventral view; d vulva, dorsal view. Abbreviations: CO-copulatory opening; CD-copulatory duct; FD-fertilization duct; S-spermatheca. Scale bars: 1 mm (a-b); 0.2 mm (c-d).

Figure 7. Serendib hispida sp. n.: a male habitus, dorsal view; b same, ventral view; c female habitus, dorsal view; d same, ventral view. Scale bars: 1 mm (a-d).

Figure 8. Serendib hispida sp. n.: a male left palp, prolateral view; b same, ventral view; c same, retrolateral view; d enlarged emblous, ventro-retrolateral view; e epigyne, ventral view; f vulva, dorsal view. Abbreviations: E-embolus; T-tegulum; ST-subtegulum; SD-sperm duct; RTA-retrolateral tibial apophysis; CO-copulatory opening; CD-copulatory duct; FD-fertilization duct; S-spermatheca. Scale bars: 0.1 mm (a-f).

Figure 9. Distribution map of the genus Serendib.