Xyphinus infaustus, Kranz-Baltensperger, 2014

Kranz-Baltensperger, Yvonne, 2014, The goblin spider genus Xyphinus (Araneae; Oonopidae), Zootaxa 3870 (1), pp. 1-79 : 52-53

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Xyphinus infaustus

sp. nov.

Xyphinus infaustus sp. nov.

( Figs 43–44 View FIGURE 43 View FIGURE 44 ; map 4 View MAP 4 )

Type material. Holotype. male ( PBI _ OON 00012841 ), INDONESIA: Sumatra: Bengkulu Province, Taba Penanjung Reserve, road Taba Penanjung to Kepahiang , 630–770 m, evergreen rain forest, sifting, 27.II.2000, leg. P. Schwendinger, MHNG.

Etymology. The specific name is a Latin adjective meaning “disastrous”, referring to difficulties during the identification of the oonopid specimens.

Diagnosis. The habitus of X. infaustus sp. nov. is similar to X. montanus , but it differs by the stronger sclerotization of the endites. Furthermore X. infaustus sp. nov. lacks the bifid apophyses on the palp ( Figs 43B View FIGURE 43 ; 44 View FIGURE 44 ).

Description. Male. Total length 1.94 mm. Carapace: Orange-brown, broadly oval in dorsal view, strongly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, with rounded posterolateral corners, posterolateral edge without pits, anterolateral corners without extension or projections, posterolateral surface without spikes, surface of pars cephalica and sides smooth, fovea present, lateral margin with blunt denticles ( Fig. 43A, C View FIGURE 43 ). Clypeus: Sinuous in frontal view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more ( Fig. 43D View FIGURE 43 ). Eyes: PME largest, ALE and PLE circular, PME oval, posterior eye row straight from above, procurved from front; ALE separated by their radius to diameter, ALE and PLE touching, PLE and PME touching, PME touching ( Fig. 43A, D View FIGURE 43 ). Sternum: as long as wide, sickle-shaped structures absent. Radial furrows opposite coxae III absent. Surface smooth ( Fig. 43B View FIGURE 43 ). Mouthparts: Chelicerae widely divergent, anterior face unmodified ( Fig. 43D View FIGURE 43 ). Labium rectangular, not indented at middle, with 3-5 setae on anterior margin. Endites bulging distally ( Fig. 43B View FIGURE 43 .). Abdomen: Anterior part pointing upwards, tip of abdomen almost reaching highest point of carapace ( Fig. 43C View FIGURE 43 ). Book-lung covers elliptical. Scuto-pedicel region with straight scutal ridge with elongated setae ( Fig. 43C View FIGURE 43 ). Dorsal scutum orange-brown, surface smooth, anterior half with small projecting denticles, dorsal scutum embedding narrow tip of abdomen. Epigastric scutum not protruding. Postepigastric scutum with short posteriorly directed lateral apodemes. Posterior spiracles connected by groove. Legs: Tibia with three, metatarsi with one trichobothria each. Genitalia: Sperm pore small, situated at level of anterior spiracles. Trochanter normal size, unmodified. Femur one to two times as long as trochanter, attaching to patella basally; patella shorter than femur; tibia one and a half times as long as patella, with two longer setae prolaterally, with three trichobothria ( Fig. 44A, C View FIGURE 44 ). Cymbium pale orange, ovoid in dorsal view, fused with bulb, but with clearly defined seam between. Bulb pale orange, distal part of bulb with several dark, plate-like apophyses, thin, translucent outgrowth dorsally ( Fig. 44 View FIGURE 44 ).

Female unknown.


Museum d'Histoire Naturelle