Gamasomorpha fricki 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: 36

publication ID 10.11646/zootaxa.3160.1.1


persistent identifier

treatment provided by


scientific name

Gamasomorpha fricki Eichenberger

n. sp.

Gamasomorpha fricki Eichenberger   n. sp.

( Figs. 27–29 View FIGURE 27 View FIGURE 28 View FIGURE 29 )

Type material: Holotype male ( PBI_OON 00015483): Vietnam: Lam Dong Province: Datanla Waterfall, 11°54'02"N, 108°26'54"E, 1300 m, evergreen hill forest, 5/11/ 12 September 2003, leg. P. Schwendinger ( MHNG). GoogleMaps   Female paratype ( PBI_OON 00016041), collected with male holotype ( MHNG). GoogleMaps   Three male paratypes ( PBI_OON 00031341, PBI_OON 00031342, PBI_OON 00031343) and one female paratype ( BPI_OON 00015483), collected with male holotype ( MHNG). GoogleMaps   Male paratype ( PBI_OON 00016042) and female paratype ( PBI_OON 00016043), collected with male holotype ( NMBE). GoogleMaps   Male paratype ( PBI_OON 00016044), collected with male holotype ( AMNH). GoogleMaps  

Etymology: The species epithet refers to the surname of the arachnologist Holger Frick from Liechtenstein, currently working at Vaduz, Liechtenstein.

Diagnosis: The species can be distinguished from other species of Gamasomorpha   by the combination of following traits: Sternum with rows of large, proximally broadened, rather fused, droplike pits between coxae I-II, II-III and III-IV (fig. 27. D, F), lateral carapace surface finely, longitudinally striated (figs. 27. E, G), abdominal scutopedicel region unmodified (fig. 28. A), male palp with strongly pointed conical extension (ce), (figs. 29. A–B).

Description: Description based on 6 males and 3 females.

MALE: Body length 2.9 mm. Uniformly orange-brown colored species, legs pale orange (figs. 27. A–C). Carapace pars cephalica surface finely transversally striated (fig. 27. G), pars thoracica without posterolateral spikes, posterolateral edge without pits, lateral margin straight from dorsal view, rebordered, with very tiny, blunt denticles (fig. 27. G), cephalic setae u-shaped distribution in double row. Anterior margin of sternum with continuous transverse groove (ctg), (fig. 27. D). Eye group by at least diameter of anterior lateral eyes narrower than clypeus (fig. 27. H), all eyes subequal in size. Abdomen scuta surface strongly punctate (fig. 28. A), setae needle-like, at epigastric area slightly plumose (fig. 28. D); pedicel tube without dorsolateral, triangular extensions; booklung covers (boc) very large, ovoid, anterolateral edge unmodified (figs. 27. C, 28. B); postepigastric scutum with short, posteriorly directed lateral apodemes, colulus represented only by setae. Legs ventral apex of tibiae III and IV with one specialized hair (sh) with fine, plumose, curved hair tip (see fig. 13. C), ventral apex of tibia I-IV with two thickened, long, needle-like setae. Male genitalia: Similar to G. asterobothros   with a long slender, lamellar embolus (em), adjacent to an embolic accessory appendage (ma) and a lamellar conductor (co) (figs. 29. A–C). Conical extension (ce) unincisive (figs. 29. A–B). Distal apex of mesal embolic accessory appendage bent ventrally, with tiny dorsal denticles (figs. 29. D–E). Cymbium about as long as bulbus.

FEMALE: Body length 3.1 mm. Postepigastric scutum without posteriorly directed lateral apodemes. Female genitalia: Ventral view (fig. 28. C): Without external features. Dorsal view (figs. 29. F–H): receptaculum (re) ovoid, elongated, secretory sac (ssa) ovoid, globular appendix (gap) clearly shorter than half the length of receptaculum, pore field of receptaculum (pof) concentrated mainly 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). Female not examined with SEM, no detailed description on promarginal chelicerae setae, serrula, grooves on lateral margin of sternum, trichobothria hood structure, tarsal organ and scopula between claws.

Distribution: Known only from the type location, the Datanla Waterfall in southern Vietnam (fig. 50. B).


Switzerland, Bern, Naturhistorische Museums


USA, New York, New York, American Museum of Natural History


Museum d'Histoire Naturelle


Naturhistorisches Museum der Burgergemeinde Bern


American Museum of Natural History