Gamasomorpha bakeri sp. nov. Figs 1, 2, 3, 12 A – C Material examined. Holotype Philippines • ♂ (NHMW -ZOO-AR-215); Luzon, Mt. Makiling; leg. C. F. Baker. Paratypes. Philippines • 3 ♂ 2 ♀ (NHMW -ZOO-AR-30391); same data as holotype. Etymology. The specific name is named after the collector, American entomologist Charles Fuller Baker (1872–1927), who worked in the Philippines from 1899–1903. Diagnosis. The new species is similar to G. ophiria Eichenberger, 2012 from Malaysia in the presence of droplike pits on the sternum, sharply pointed denticles along the lateral margin of the carapace, and posterolateral spikes on the carapace, but can be distinguished by the carapace with three posterolateral spikes (vs two; cf. Fig. 1 E and Eichenberger et al. 2012: fig. 15 C), the booklung covers are smooth (vs elevated from body surface; cf. Fig. 3 F and Eichenberger et al. 2012: fig. 15 I, J), and the embolus has a folded tip (vs straight; cf. Fig. 2 B, F and Eichenberger et al. 2012: fig. 16 A – C). Description. Male (holotype). Total length 2.78; carapace 1.24 long, 0.91 wide; abdomen 1.49 long, 1.01 wide. Habitus as in Fig. 1 A – C. Body reddish brown, legs yellow. Carapace (Fig. 1 D, E): surface smooth, with 3 pairs of posterolateral spikes, posterolateral edge with pair of pits; lateral margin with pointed denticles; pars cephalica slightly elevated in lateral view. Eyes (Fig. 1 D, E): ALE largest, PLE smallest; posterior eye row straight viewed from above, procurved from front; ALE separated by about their radius; ALE separated from edge of carapace by about 0.8 times their diameter. Sternum (Fig. 1 F): longer than wide, surface smooth, with radial furrows of large, roundish, droplike pits between coxae. Abdomen (Fig. 1 A – C): dorsal scutum ovoid, punctate, densely covered with short setae; booklung covers middle size; pedicel tube short, without dorsolateral extension; scuto-pedicel region without scutal ridge. Palp (Figs 2 A – F, 12 A – C): pale-orange; bulb distally tapering, ending as small conical extension (ce); cymbium extending beyond distal tip of bulb; embolus (em) dark, long, slender, lamellar, with folded tip, half way to distal tip split into second, slightly shorter, mesal embolic accessory appendage (ma), adjacent to third, slightly shorter, lamellar conductor (co). Female (paratype). Total length 2.88; carapace 1.35 long, 0.99 wide; abdomen 1.56 long, 1.21 wide. As in male, except as noted. Epigastric area (Fig. 3 E, H): externally without special features. Endogyne (Fig. 3 I): receptacle broadly oval, with ovoid secretory sac (ssa), globular appendix (gap) narrow, with anterior paddle-like sclerite (psc) and nail-like process (na), lateral sclerites functioning as muscle attachments. Distribution. Known only from the type locality (Fig. 13).

Published as part of 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, pp. 313-331 in ZooKeys 1258 on pages 313-331, DOI: 10.3897/zookeys.1258.168616