Gamasomorpha bakeri, Bai & Bian & Tong & Hörweg, 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

publication ID	https://doi.org/10.3897/zookeys.1258.168616
publication LSID	lsid:zoobank.org:pub:AA21AAC3-8394-4B0D-8C8C-EF9A1D59CE03
DOI	https://doi.org/10.5281/zenodo.17543607
persistent identifier	https://treatment.plazi.org/id/DA1C046C-8AEB-5918-9AA5-B84222D73BEA
treatment provided by	ZooKeys by Pensoft
scientific name	Gamasomorpha bakeri
status	sp. nov.

Treatment

Gamasomorpha bakeri sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 12 A – C View Figure 12

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 View Figure 1 and Eichenberger et al. 2012: fig. 15 C), the booklung covers are smooth (vs elevated from body surface; cf. Fig. 3 F View Figure 3 and Eichenberger et al. 2012: fig. 15 I, J), and the embolus has a folded tip (vs straight; cf. Fig. 2 B, F View Figure 2 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 View Figure 1 . Body reddish brown, legs yellow. Carapace (Fig. 1 D, E View Figure 1 ): 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 View Figure 1 ): 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 View Figure 1 ): longer than wide, surface smooth, with radial furrows of large, roundish, droplike pits between coxae. Abdomen (Fig. 1 A – C View Figure 1 ): 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 View Figure 2 , 12 A – C View Figure 12 ): 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 View Figure 3 ): externally without special features. Endogyne (Fig. 3 I View Figure 3 ): 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 View Figure 13 ).