Aposphragisma globosum Fardiansah & Duperre , sp. n.

Fardiansah, Riko, Duperre, Nadine, Widyastuti, Rahayu, Potapov, Anton, Stefan Scheu, & Harms, Danilo, 2018, Description of three new species of Aposphragisma Thoma, 2014 (Araneae: Oonopidae) from Sumatra, Indonesia, ZooKeys 797, pp. 71-85 : 74-76

Aposphragisma globosum Fardiansah & Duperre, sp. n. Figs 1, 2, 3

Type material.

Holotype. ♂: Indonesia, Sumatra, Harapan, 02°09'09.9"S 103°21'43.2"E, secondary lowland rainforest, 26 November 2017, B. Klarner (LIPI). Paratypes. 1♀, Indonesia, Sumatra, Harapan, 01°54'35.6"S 103°15'58.3"E, oil palm plantation, October 2012, M. Jochum, A. Barnes (LIPI); 01°54'39.5"S 103°16'00.1"E, 2♂, rubber plantation, October 2013, B. Klarner ( ZMH–A 0000984, ZMH–A 0000986); 02°09'09.9"S 103°21'43.2"E, 1♂2♀, secondary lowland rainforest litter, October 2013, B. Klarner ( ZMH–A 00001002, ZMH–A 0001022, ZMH–A 0001505); 01°55'44.0"S 103°15'33.8"E, 2♀, agroforest with a mixture of native vegetation and planted rubber trees, October 2012, M. Jochum, A. Barnes ( ZMH–A 0001304, ZMH–A 0001305).

Etymology.

The specific name is an adjective in apposition taken from Latin, meaning globular in reference to the shape of female genitalia.

Diagnosis.

Aposphragisma globosum sp. n. males and females can be distinguished from most Aposphragisma species by the presence of prosomal spikes (Fig. 1G) and a coarsely reticulated sternum (Fig. 1F). From A. brunomanseri Thoma, 2014 it can be separated by the presence of only one pair of prosomal spikes (Fig. 1G), the latter species having two pairs of spikes ( Thoma et al. 2014; fig. 2E, F); males are differentiated from A. kolleri Thoma, 2014 by their strongly twisted tip of the embolus (Fig. 3B), which is spatulate in the latter species ( Thoma et al. 2014; fig. 27C).

Description.

Male (holotype). Total length: 1.54; carapace length: 0.69; carapace width: 0.53; abdomen length: 0.85; abdomen width: 0.51. Cephalothorax. Carapace: Brownish orange, broadly oval in dorsal view, slightly elevated in lateral view, surface of elevated portion of pars cephalica smooth and with 1 pair of spikes at the apical end; sides and pars thoracica finely reticulated, partly interrupted by small smooth areas, lateral margin with blunt denticles (Fig. 1A, G). Sternum: Brownish orange; longer than wide, coarsely reticulated except of median stripe and smooth edges, covered by sparse setae; posterior margin extending posteriorly (Fig. 1E). Eyes: Six; ALE largest, ALE oval, PME circular, PLE oval; posterior eye row straight from above, procurved from front; ALE separated by their diameter, ALE-PLE separated by less than ALE radius, PMEs joint together, PLE-PME separated by less than PME radius (Fig. 1A). Mouthparts: chelicerae yellowish brown; straight in frontal view, convex in lateral view; anterior face strongly indented; posterior margin of inner surface proximally modified to a ridge with median slit (sli); promargin with row of flattened setae that extend distally into a short inward-pointing tooth-like projection (tlp) (Fig. 1G). Labium triangular, deeply incised, fused to sternum (Fig. 1E). Endites elongated; outer margin subdistally with a pair of long inward-bent setae. Abdomen. Dorsal scutum brownish yellow, ovoid; strongly sclerotized, covering most of dorsum (Fig. 1A); epigastric scutum strongly sclerotized, anteriorly with subterminal scutal ridge (sr) which is widely oval (Fig. 2A); book lung covers large (bc), oval (Fig. 2A). Postepigastric scutum long, strongly sclerotized, occupying most of the venter, with posteriorly directed lateral apodemes (lap) (Fig. 2B). Legs: yellowish orange. Genitalia. Epigastric region: sperm pore (sp) situated at level of posterior spiracles (Fig. 2B). Palp: Yellowish bright, not strongly sclerotized (Fig. 3A); cymbium slightly ovoid in dorsal view; bulb stout; conical bulge (cb) strongly pronounced (Fig. 3A, B); embolus (e) tip twisted; conductor (c) with blunt tip (Fig. 3B).

Female (paratype). Total length: 1.75; carapace length: 0.77; carapace width: 0.55; abdomen length: 0.98; abdomen width: 0.65. Colouration: same as in male. Cephalothorax. Carapace: Same as in male. Mouthparts: chelicerae distally without pointing tooth-like projection. Abdomen. Epigastric scutum not fused to postepigastric scutum (Fig. 2D); postepigastric scutum with posteriorly directed lateral apodemes (lap) (Fig. 2D). Legs: yellowish white. Genitalia. Dorsal view (Fig. 3C): receptaculum (re) large, globular, convex and sloping upward containing a globular sac-like structure (sa); anterior part covered with papillae (pa), mediolateral with wrinkle-like lines (wl); laterally framed by rectangular sclerites (apodemes, lap) that have wide and slightly folded tips, apodemes sloping upward; globular appendix (gap) lying dorsally of receptaculum and about 1/3 as long as receptaculum; a transverse sclerite (tsc) lies anteriorly to the receptaculum and bears a nail-like structure (na) more medially.

Natural History.

Specimens were collected in four types of habitats: secondary lowland rainforest, oil palm plantation, and rubber plantation.

Distribution.

Known only from the type locality: Harapan on Sumatra.