Gamasomorpha seximpressa Simon, 1907

Eichenberger, Beata, Kranz-Baltensperger, Yvonne, Ott, Ricardo, Graber, Werner, Nentwig, Wolfgang & Kropf, Christian, 2012, Morphology of new Indian / Indonesian Gamasomorpha and Xestaspis species (Araneae: Oonopidae) 3160, Zootaxa 3160 (1), pp. 1-68 : 40

Gamasomorpha seximpressa Simon, 1907

( Figs. 30–31 )

Gamasomorpha seximpressa (Simon, 1907: 254)

Type material examined: Female holotype ( PBI_OON 00005501 ): Indonesia: Java: Mt. Gedé , det. Simon, deposited in Museum Paris, AR 14179 .

Diagnosis: Resembles G. asterobothros n. sp. and G. petoteca n. sp. Male palp with unique thorn (th) near base at dorsal side of mesal embolic accessory appendage (ma), (fig. 31. G). Female not clearly distinguishable from G. petoteca n. sp. and G. asterobothros n. sp.

Description: Female redescribed on the basis of holotype and 8 new specimens, male newly described based on 4 individuals.

MALE: Body length 2.9 mm. Uniformly red-brown colored species, legs orange-brown (figs. 30. A–C). Similar to G. asterobothros: Sternum with radial furrows of large, roundish droplike pits between coxae I-II, II-III, III- IV (fig. 30. E), anterior margin with interrupted transverse groove (itg) (fig. 30. E). Carapace with three pairs of posterolateral spikes (cps) (figs. 30. C, G), lateral margin with blunt denticles (fig. 30. G), posterolateral edge with a pair of pits (cpp) (fig. 30. G). Eye group by radius to diameter of anterior lateral eyes narrower than clypeus (fig. 30. D). Abdomen scuto-pedicel region with paired curved scutal ridges (psr) (fig. 31. A), pedicel tube with small, dorsolateral, triangular extensions (pds) (fig. 31. A). Booklung covers (boc), quite large, ovoid, anterolateral edge unmodified (fig. 31. B). Male genitalia: Similar to G. asterobothros n. sp. with a long slender, lamellar embolus (em), adjacent to an embolic accessory appendage (ma) and a lamellar conductor (co) (figs. 31. E–G). Conical extension (ce) unincisive (figs. 31. E–F). No detailed description on promarginal chelicerae setae, serrula, grooves on lateral margin of sternum, trichobothria hood structure, tarsal organ and scopula between claws.

FEMALE: As in male except as noted. Slightly larger than male. Carapace lateral margin smooth or with denticles. Opisthosoma more round. Postepigastric scutum not fused to epigastric scutum. Female palp claws and spines absent, tarsus unmodified. Serrula present in single row.

Female genitalia: Ventral view (fig. 31. C): Without external features. Dorsal view (fig. 31. D): independent internal sclerite present; semifused to the ventral scutum anterior border. Receptaculum and secretory sac roundish to ovoid, located mainly between the epigastric furrow and posterior tracheal groove. Large globular appendix, arising dorsally on the genital sclerite and attached to the anterior part of receptaculum. With large paddle-like sclerite near the anterior end of genital sclerite.

Distribution: Indonesia, Java (fig. 49. B)

Intraspecific variation: Carapace lateral margin smooth or with blunt denticles (detected only in females); abdominal scuta with needle-like or slightly plumose setae.

Figures

FIGURE 30: Gamasomorpha seximpressa Simon. Male: A. habitus dorsal view; B. habitus ventral view; C. habitus lateral view; D. carapace anterior view; E. sternum ventral view; G. carapace dorsal view. Female: F. sternum ventral view; H. carapace dorsal view. Abbreviations: cps, carapace posterolateral spikes; itg, interrupted transverse groove; cpp, carapace posterolateral pits; Scale bars: A–C 1 mm; D–H 0.5 mm.

FIGURE 31: Gamasomorpha seximpressa Simon. Male: A. abdomen anterior view; B. booklung covers lateral view; E–F. right palp, prolateral view; G. right embolus, prolateral-ventral view. Female: C. abdomen ventral view; D. internal genitalia ventral view. Abbreviations: psr, paired scutal ridges; pds, pedicel tube dorsolateral spikes; boc, booklung covers; ce, conical extension; em, embolus; co, conductor; ma, mesal embolic accessory appendage; th, thorn. Scale bars: A 1 mm; B 0.2 mm; C 0.5 mm; E–F 300 µm; G 100 µm.