Aposphragisma jambi 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 : 76-80

Aposphragisma jambi Fardiansah & Duperre, sp. n. Figs 4, 5, 6

Type material.

Holotype ♂: Indonesia, Sumatra, Bukit Duabelas, 01°59'42.5"S 102°45'08.1"E, secondary lowland rainforest, October 2012, M. Jochum, A. Barnes (LIPI). Paratypes: 1♀, Indonesia, Sumatra, Bukit Duabelas, 02°08'26.6"S 102°51'04.3"E, agroforest with a mixture of native vegetation and planted rubber trees, October 2012, M. Jochum. A. Barnes (LIPI); 01°59'42.5"S 102°45'08.1"E, 2♀, secondary lowland rainforest litter, October 2013, B. Klarner ( ZMH–A 0000994, ZMH–A 0000998), 01°59'42.5"S 102°45'08.1"E, 2♀, October 2012, M. Jochum, A. Barnes ( ZMH–A 0001273, ZMH–A 0001282).

Etymology.

The specific name is a noun in apposition and refers to the name of Jambi Province where Bukit Duabelas National Park is located.

Diagnosis.

Aposphragisma jambi sp. n. males and females can be distinguished from most of the other Aposphragisma species by their finely reticulate carapace lacking spikes (Fig. 4A, C, G, H) and by their finely reticulated sternum with smooth median stripe (Fig. 4E, F); from A. baltenspergerae Thoma, 2014 and A. retifer Thoma, 2014 males are differentiated by their wider and strongly twisted embolus tip (Fig. 6B), not twisted in A. baltenspergerae and A. retifer ( Thoma et al. 2014; figs. 4C and 37E respectively) and females by their elongated oval receptaculum (Fig. 6C), globose in A. baltenspergerae ( Thoma et al. 2014; fig. 4G).

Description.

Male (holotype). Total length: 1.54; carapace length: 0.68; carapace width: 0.47; abdomen length: 0.86; abdomen width: 0.48. Cephalothorax. Carapace: Brownish orange, broadly oval in dorsal view, slightly elevated in lateral view, surface of elevated portion of pars cephalica smooth and without spikes, with 2 small tubercles at apical end that each bears a seta (Fig. 4A, G); sides of carapace finely reticulated; pars thoracica finely reticulated, sloping gradually; lateral margin with blunt denticles (Fig. 4G). Sternum: Brownish orange; longer than wide, finely reticulated except median stripe and broadly smooth edges, surface covered by setae (Fig. 4E). Eyes: Six, all oval; ALE largest, posterior eye row straight from above; ALE separated by less than its radius, ALE-PLE touching, PME touching, PLE-PME touching (Fig. 4A). Mouthparts: chelicerae yellowish white, slightly divergent, anterior face convex in lateral view (Fig. 4G), inner surface covered by thick setae; posterior margin of inner surface proximally modified into a ridge with median slit; promargin with a row of flattened setae, distally extending into a short inwards-pointing tooth-like projection. Labium triangular, deeply incised, fused to sternum (Fig. 4E). Endites elongated, outer margin subdistally with a pair of long inward-bent setae. Abdomen. Dorsal scutum brownish yellow, ovoid; strongly sclerotized and covering full length of abdomen (Fig. 4A); book lung covers large, ovoid, surface smooth (Fig. 5A); epigastric scutum strongly sclerotized, anteriorly with widely oval subterminal, scutal ridge (sr) (Fig. 5A). Postepigastric scutum long, strongly sclerotized and occupying most of the venter, posteriorly-directed long lateral apodemes (lap) (Figs 4B, 5B). Legs: yellowish white. Genitalia. Epigastric region: sperm pore (sp) situated at level of posterior spiracles (Fig. 5B). Palp: Light yellow, not strongly sclerotized (Fig. 6A); cymbium slightly ovoid or rectangular in dorsal view; bulb stout; conical bulge (cb) only slightly pronounced (Fig. 6A, B); embolus (e) tip folded, conductor (c) with pointed tip (Fig. 6B).

Female (paratype). Total length: 1.54; carapace length: 0.70; carapace width: 0.49; abdomen length: 0.84; abdomen width: 0.53. Colouration: Same as in male. Cephalothorax. Carapace: Same as in male. Mouthparts: Chelicerae: distally without pointing tooth-like projection. Abdomen. Dorsal scutum not covering full length of the abdo men, soft tissue visible in dorsal view (Fig. 4C); epigastric scutum not fused to postepigastric scutum (Fig. 5C, D); postepigastric scutum with short posteriorly directed lateral apodemes (lap) (Fig. 5D). Legs: yellowish white. Genitalia. Dorsal view (Fig. 6C): Receptaculum (re) large, elongated oval, convex and sloping upward, containing an oval sac-like structure (sa), anterior and median part covered with papillae, anterolateral with wrinkle-like lines; laterally framed by rectangular sclerites (apodemes, lap) and with a wide and slightly folded tip; apodemes sloping upward; globular appendix lying dorsally of receptaculum and about 1/4 as long as receptaculum; a transverse sclerite (tsc) lies anteriorly to the receptaculum and has a nail-like structure (na) in medial position.

Natural History.

Specimens were collected in a secondary degraded lowland rainforest only.

Distribution.

Known only from the type locality, Bukit Duabelas National Park, Sumatra.