Gamasomorpha squalens Eichenberger, 2012

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 : 23-27

Gamasomorpha squalens Eichenberger n. sp.

( Figs. 17–19 )

Type material: Holotype male ( PBI_OON 00016032 ): West-Malaysia: Pahang: Bukit Charas , 3°54'41.1"N / 103°08'50.2"E, 60 m, rain forest remnants at foot of limestone hill, 3 – 4 June 2004, leg. P. Schwendinger ( MHNG). Female paratype ( PBI_OON 00016033 ) collected with male holotype ( MHNG). Two male paratypes ( PBI_OON 00012003 , PBI_OON 00012002 ) and female paratype ( PBI_OON 00031344 ), collected with male holotype ( MHNG). Male paratype ( PBI_OON 00016034 ) and female paratype ( PBI_OON 00016035 ), collected with male holotype ( NMBE).

Etymology: The species epithet is the Latin adjectival attribute squalens which refers to the very finely striate abdominal scuta surface which appears matt when observing the specimen deposited in alcohol with a stereomicroscope.

Diagnosis: Can be distinguished from other species of Gamasomorpha by the combination of following traits: Sternum with rows of large, laterally rather narrow than round and partly fused, droplike pits between coxae I-II, II-III and III-IV (fig. 17. D), abdominal scuta surface very finely striated (fig. 18. D). Embolus of male palp mesal embolic accessory appendage and conductor broadish (figs. 19. A–B, D). Shape of female receptaculum broadlyovoid (figs. 19. F–H).

Description: Description based on 4 males and 3 females.

MALE: Body length 2.9 mm. Uniformly orange-brown colored species, legs pale orange (figs. 17. A–C). Anterior margin of sternum with continuous transverse groove (ctg) (fig. 17. D). Carapace pars cephalica rather strongly elevated in lateral view, surface very finely diagonally striated, pars thoracica with one pair of tiny posterolateral spikes (cps) (fig. 17. F), surface sides very finely reticulate, posterolateral edge with a pair of pits (cpp) (fig. 17. F), lateral margin straight from dorsal view, cephalic setae u-shaped distribution in single to double row. Posterior margin of sternum less extending than in G. asterobothros n. sp. Eye group by less than diameter of anterior lateral eyes narrower than clypeus, all eyes oval, about subequal (fig. 17. E). Abdomen scuto-pedicel region and pedicel tube unmodified (fig. 18. A), scuto-pedicel region with needle-like, long seteae; booklung covers small, very narrow (fig. 18. B); postepigastric scutum with short, posteriorly directed lateral apodemes. Legs patella plus tibia I shorter than carapace; Ventral apex of tibiae III and IV with specialized hairs with fine, plumose, curved hair tip (sh) adjacent to proximal feather-like hairs (fh) (fig. 18. E). 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. 19. A–E). Conical extension unincisive (ce) (figs. 19. A–B).

FEMALE: Body length 3.2 mm. Postepigastric scutum without posteriorly directed lateral apodemes. Legs patella plus tibia I nearly as long as carapace. Female genitalia: Ventral view (fig. 18. C): Without external features. Dorsal view (figs. 19. F–H): receptaculum (re) broadly-oval, with groove-like modifications dorsally, with ovoid secretory sac (ssa), globular appendix (gap) narrow, slightly shorter than half the length of the receptaculum, pore field of receptaculum (pof) located along globular appendix, with an anterior paddle-like sclerite (psc) and a nail-like process (na), with lateral sclerites functioning as muscle attachments (A1).

Distribution: West-Malaysia, Bukit Charas (fig. 49. A).

Figures

FIGURE 17: Gamasomorpha squalens n. sp. Male: A. habitus dorsal view; B. habitus ventral view; C. habitus lateral view; D. sternum ventral view; E. carapace anterior view; F. carapace dorsal view. Female: G. carapace posterior view. Abbreviations: ctg, continuous transverse groove; cpp, carapace posterolateral pits. Scale bars: A–C 1 mm; D–G 0.5 mm.

FIGURE 18: Gamasomorpha squalens n. sp. Male: A. abdomen anterior view; B. booklung covers lateral view; D. abdomen dorsal scutum SEM; E. tibia IV ventral apex. Female: C. abdomen ventral view. Abbreviations: sh, special hairs; fh, featherlike hairs; sc, scopula dorsal view. Scale bars: A 0.5 mm; B 0.2 mm; C 1 mm; D–F 50 µm.

FIGURE 19: Gamasomorpha squalens n. sp. Male: A,B. right palp, prolateral view; C. left palp, dorsal view, SEM; D. right embolus, ventral view; E. left embolus, dorsal view, SEM. Female: F,G. epigastric region, dorsal view; H. epigastric region, posterior view. Abbreviations: ce, conical extension; em, embolus; co, conductor; ma, mesal embolic accessory appendage; psc, paddle-like sclerite; na, nail-like process; go, genital opening; gap, globular appendix; pof, pore field of receptaculum; re, receptaculum; ssa, secretory sac; A1, lateral sclerites functioning as muscle attachments. Scale bars: A–C, F–H 300 µm; D–F 100 µm.