Gamasomorpha insomnia 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 : 19-21

Gamasomorpha insomnia Eichenberger n. sp.

( Figs. 11–14 )

Type material: Holotype male ( PBI_OON 00031328 ): West-Malaysia: Pahang: Charas Hill ca. 3 km N of Panching (03°54'41.1"N, 103°08'50.2"E), 60 m, evergreen forest on limestone, 9-10 July 2001, leg. P. Schwendinger ( MHNG). Female paratype ( PBI_OON 00031329 ), collected with male holotype ( MHNG).

Etymology: The species epithet is a noun in apposition and refers to the Latin and English noun insomnia because the discrimination of intraspecific variation and feasible characters for a differentiation to other species caused sleepless nights.

Diagnosis: Can be distinguished from other species of Gamasomorpha by the combination of following traits: Sternum with rows of large, roundish, droplike pits between coxae I-II, II-III and III-IV (figs. 11. D–F), male palp with a transparent, denticulated seam (ds) on mesal embolic accessory appendage (ma), (fig. 14. D–E); abdomen scuto-pedicel region unmodified; booklung covers quite large, ovoid, not elevated from body surface.

Description: Description based on 34 males and 38 females.

MALE: Body length 2.4 – 2.8 mm. Uniformly red-brown colored species, legs pale orange (figs. 11. A–C). Anterior margin of sternum with interrupted transverse groove (itg) (figs. 11. D, F). Posterolateral edge of carapace with a pair of pits (cpp) (figs. 11. G; 12. B). Eye group by radius to diameter of anterior lateral eyes narrower than clypeus (fig. 12. A). Abdomen scuto-pedicel region and pedicel tube unmodified (figs. 12. E, F). Lateral margin of carapace straight from dorsal view. 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. 14. A–E). Conical extension unincisive (ce) (figs. 14. A–C).

FEMALE: Body length 2.5 – 3.1 mm. Female genitalia: Ventral view (fig. 13. A): Without external features. Dorsal view (figs. 14. F–H): receptaculum (re) and secretory sac (ssa) ovoid, globular appendix (gap) narrow, about half the length of receptaclum, pore field of receptaculum (pof) concentrated at posterior end of 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, Thailand, Borneo, Sulawesi, Irian Jaya (figs. 49. A–B, 50. A–B).

Intraspecific variation: Proximal pits of posterior sternal furrows may be elongated (fig. 11. E). Carapace with 2 or 3 pairs of posterolateral spikes whose size may vary (figs. 12. C–D); lateral margin smooth or with blunt to sharply pointed denticles (figs. 11. G–H). Abdomen surface smooth or punctate (figs. 12. G–H). Denticulated seam (ds) on male palpal mesal embolic accessory appendage varies in size.

Figures

FIGURE 11: Gamasomorpha insomnia n. sp. Male: A. habitus dorsal view; B. habitus ventral view; C. habitus lateral view; D–E. sternum ventral view; F. carapace ventral view, SEM; G–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 12: Gamasomorpha insomnia n. sp. Male: A. carapace anterior view; B. carapace posterior view; C. carapace lateral view; E. abdomen anterior view; F. booklung covers lateral view; G–H. abdomen dorsal view. Female: D. carapace lateral view. Abbreviations: cpp, carapace posterolateral pits; cps, carapace posterolateral spikes; boc, booklung covers. Scale bars: A–E, G–H 0.5 mm; F 0.2 mm.

FIGURE 13: Gamasomorpha insomnia n. sp. Male: B. sperm pore; C. tibia IV, ventral apex, special hairs. Female: A. abdomen ventral view. Scale bars: A 0.5 mm; B 50 µm; C 100 µm.

FIGURE 14: Gamasomorpha insomnia n. sp. Male: A,B. right palp, prolateral view; C. left palp, anterior view, SEM; D. right embolus, ventral-prolateral view; E. left embolus, dorsal-retrolateral 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; ds, denticulated seam; spo, spermatic opening; psc, paddle-like sclerite; na, nail-like process; gap, globular appendix; pof, pore field of receptaculum; re, receptaculum; ssa, secretory sac; A1, lateral sclerites functioning as muscle attachments. Scale bars: A–B, F-H 300 µm; C 200 µm; D 100 µm; E 50 µm.