Xyphinus infaustus, Kranz-Baltensperger, 2014

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

Xyphinus infaustus sp. nov.

( Figs 43–44 ; 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 ; 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 ). Clypeus: Sinuous in frontal view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more ( Fig. 43D ). 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 ). Sternum: as long as wide, sickle-shaped structures absent. Radial furrows opposite coxae III absent. Surface smooth ( Fig. 43B ). Mouthparts: Chelicerae widely divergent, anterior face unmodified ( Fig. 43D ). Labium rectangular, not indented at middle, with 3-5 setae on anterior margin. Endites bulging distally ( Fig. 43B .). Abdomen: Anterior part pointing upwards, tip of abdomen almost reaching highest point of carapace ( Fig. 43C ). Book-lung covers elliptical. Scuto-pedicel region with straight scutal ridge with elongated setae ( Fig. 43C ). 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 ). 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 ).

Female unknown.

Figures

MAP 4. Records of X. infaustus sp. nov. (star), X. rogerfedereri sp. nov. (triangles), X. pachara sp. nov. (circle) and X. karschi (squares).

FIGURE 43. Xyphinus infaustus sp. nov., male. A, habitus, dorsal view; B, habitus, ventral view; C, habitus, lateral view; D, carapace, anterior view; E, abdomen, anterior view. Scale bars A, B, C = 1 mm; D, E = 0.5 mm.

FIGURE 44. Xyphinus infaustus sp. nov., male. A, C, left palp, prolateral view; B, D, left palp, retrolateral view; E, left palp, ventral view. Scale bars = 0.1 mm.