Gamasomorpha shoushanensis ( Tong & Li, 2014 ), 2025

Bai, Yang, Bian, Dongju, Tong, Yanfeng & Hörweg, Christoph, 2025, Three new species of the genus Gamasomorpha Karsch, 1881 (Araneae, Oonopidae) from the Philippines and Sumatra, Indonesia, ZooKeys 1258, pp. 313-331 : 313-331

Gamasomorpha shoushanensis ( Tong & Li, 2014) comb. nov.

Figs 9 , 10 , 11 , 12 J – L

Xestaspis shoushanensis Tong & Li, 2014: 81, figs 8 A – K, 9 A – J, 10 A – C ( ♂ ♀).

Material examined.

Indonesia • 5 ♂ 5 ♀ ( NHMW -ZOO-AR-30395 ); Sumatra, Fort de Kock ; leg. E. R. Jacobson . • 13 ♂ 23 ♀ ( NHMW -ZOO-AR-30396 ); same data as above .

Other materials.

Holotype China • ♂ ( IZCAS AR 27810 ); Taiwan, Kaohsiung City, Shoushan Mt. ; 29. VI. 2013; S. Li et al. leg. Paratypes. • 1 ♀ ( SYNU-11 ); same data as holotype • 2 ♀ ( SYNU-57 ); same data as holotype .

Diagnosis.

This species is similar to G. fricki Eichenberger, 2012 from Vietnam in the striated carapace and the pointed conical extension of bulb, but can be distinguished by the radial furrow of the sternum lacking the droplike pits (vs with droplike pits; cf. Fig. 9 F and Eichenberger et al. 2012: fig. 27 D), the scuto-pedicel region with a scutal ridge (vs lacking; cf. Fig. 11 H and Eichenberger et al. 2012: fig. 28 A), and the booklung covers are very small (vs large; cf. Fig. 11 G and Eichenberger et al. 2012: fig. 27 C).

Description.

See Tong and Li (2014).

Comments.

Species of Xestaspis are similar to those of Gamasomorpha except for the presence of a pointed tubercle on the anterolateral face of the epigastric scuta ( Ott and Harvey 2008). According to Eichenberger et al. (2012), the separation of the two genera may be arbitrary. The genus Xestaspis is most probably a junior synonym of Gamasomorpha ( Ranasinghe and Benjamin 2016) . We re - checked the type specimens of Xestaspis shoushanensis and the new materials from Sumatra. The pointed tubercles of the booklung covers of this species are inconspicuous. Thus, we transfer it from Xestaspis to Gamasomorpha , as a new combination, Gamasomorpha shoushanensis .

Distribution.

China ( Taiwan), Indonesia (Fig. 13 ).

Figures

Figure 9. Gamasomorpha shoushanensis (Tong & Li, 2014), male. A – C. Habitus, dorsal, lateral and ventral views; D – G. Prosoma, dorsal, lateral, ventral and anterior views. Scale bars: 0.4 mm.

Figure 10. Gamasomorpha shoushanensis (Tong & Li, 2014), male left palp. A, C, E. Prolateral, dorsal and anterior-retrolateral views; B, D, F. Distal part of bulb, prolateral, dorsal and anterior-retrolateral views. Abbreviation: ce = conical extension; co = conductor; em = embolus; ma = mesal embolic accessory appendage. Scale bars: 0.1 mm.

Figure 11. Gamasomorpha shoushanensis (Tong & Li, 2014), female. A – C. Habitus, dorsal, lateral and ventral views; D – F. Prosoma, dorsal, lateral and ventral views; G, H. Abdomen, ventral and anterior views; I. Epigastric region, ventral view; J. Endogyne, dorsal view. Abbreviations: gap = globular appendix; na = nail-like process; psc = paddle-like sclerite; re = receptacle; ssa = secretory sac. Scale bars: 0.4 mm (A – H); 0.1 mm (I, J).

Figure 12. Gamasomorpha spp., male left palp. A – C. G. bakeri sp. nov.; D – F. G. fortdekock sp. nov.; G – I. G. jacobsoni sp. nov.; J – L. G. shoushanensis (Tong & Li, 2014). A, D, G, J. Prolateral view; B, E, H, K. Dorsal view; C, F, I, L. Retrolateral view. Scale bars: 0.1 mm.

Figure 13. Distribution records of the four Gamasomorpha species: 1. G. bakeri sp. nov.; 2. G. fortdekock sp. nov.; 3. G. jacobsoni sp. nov.; 4. G. shoushanensis (Tong & Li, 2014).