Orchestina subclavulata Tong & Li, 2024

Song, Chenxue, Tong, Yanfeng, Bian, Dongju & Li, Shuqiang, 2024, A survey of the genus Orchestina Simon, 1882 (Araneae, Oonopidae) from Xishuangbanna, China, with descriptions of five new species, Zoosystematics and Evolution 100 (1), pp. 255-277 : 255

Orchestina subclavulata Tong & Li sp. nov.

Figs 8 , 9

Type material.

Holotype: ♂ (SYNU-776), China, Yunnan, Mengla Co., Menglun Town, XNNR, fogging, seasonal rainforest, 55 Km (21°57.953'N, 101°12.305'E), elev. 781 m, 13 August 2011, Zheng, Zhao & Gao leg. Paratypes: 5♂ (SYNU-819-823), same data as for holotype.

Etymology.

The specific name refers to the similarities to O. clavulata .

Diagnosis.

The new species is similar to O. clavulata and O. menglun sp. nov. in having the pear-shaped bulb and the net-shaped pattern on carapace, but can be distinguished by the endites with triangular outgrowth (Figs 8G , 9D ), vs. without triangular outgrowth in O. clavulata (Fig. 1E ) and O. menglun (Fig. 7D ), and the sperm duct overlapped at the margin of bulb (white arrow in Fig. 9A ) vs. not overlapped in O. clavulata (Fig. 1B ) and O. menglun (Fig. 7A ).

Description.

Male (holotype). Total length 0.96, carapace length 0.41, carapace width 0.39, abdomen length 0.48. Habitus as in Fig. 8A-C . Color in alcohol: carapace yellow, abdomen, legs and palp pale yellow. Carapace oval, with net-shaped pattern, pars cephalica strongly elevated in lateral view, with rounded posterolateral corners. Clypeus (Fig. 8F ) margin unmodified, curved downwards in front view, rounded forward in lateral view. Sternum (Fig. 8G ) longer than wide, pale yellow, with marginal band and median area of radiating lines, surface smooth. Mouthparts: chelicerae elongate, anterior face unmodified; labium elongate, spade-shaped, not fused to sternum, anterior margin not indented at middle; endites (Figs 8G , 9D ) strongly sclerotized, with triangular outgrowth, outer margin with serrula. Abdomen ovoid, with ^-shaped pattern. Genitalia (Fig. 9A-C ): tibia of palp strongly enlarged, length/width ratio = 1.67, cymbium small; bulb pear-shaped in lateral view, with ventral side strongly protruding proximally, about 0.91 times as wide as tibia; the sperm duct strongly curved with three loops; embolus short, with sub-apical, opaque crest.

Female. Unknown.

Distribution.

Known only from the type locality.

Figures

Figure 1. Orchestina clavulata Tong & Li, 2011, male (SYNU- 777). A, C, D. Left palp, prolateral, retrolateral and dorsal views; B. Left bulb, prolateral view; E. Endites and labium, ventral view. Abbreviation: Se = serrula. Scale bars: 0.1 mm.

Figure 7. Orchestina menglun sp. nov., A-D, holotype male; Orchestina colubrina Liu, Henrard & Xu, 2019, E, F, male (SYNU- 841). A, E. Left palp, prolateral view; B, F. Left palp, retrolateral view; C. Left palp, dorsal view; D. Endites and labium, ventral view. Abbreviation: Se = serrula. Scale bars: 0.1 mm.

Figure 8. Orchestina subclavulata sp. nov., holotype male. A-C. Habitus, dorsal, ventral and lateral views; D-G. Prosoma, dorsal, lateral, anterior and ventral views. Scale bars: 0.4 mm (A-C); 0.2 mm (D-G).

Figure 9. Orchestina subclavulata sp. nov., holotype male. A-C. Left palp, prolateral, retrolateral and dorsal views, white arrow shows the overlapped sperm duct, red arrow pointing on subapical crest of embolus; D. Endites and labium, ventral view. Abbreviations: Se = serrula; TO = triangular outgrowth. Scale bars: 0.1 mm.