Prosoponoides jambi, Tanasevitch, 2017

Tanasevitch, Andrei V., 2017, New genera and new species of the family Linyphiidae from Borneo, Sumatra and Java (Arachnida, Araneae), Revue suisse de Zoologie 124 (1), pp. 141-155 : 142-145

Prosoponoides jambi sp. nov.

Figs 9-10 , 19-21

Holotype: Male; Indonesia, Sumatra, Jambi Province, Mt Kerinci, footpath to summit, N of Kersik Tua , 2160 m a.s.l., montane rain forest, sifting; 17.-18. II.2000; leg. P. Schwendinger [Sum-00/13].

Other material examined: MHNG; male holotype of Prosoponoides hamatum Millidge & Russel-Smith, 1992 . – MHNG; male holotype of P. simile Millidge & Russel-Smith, 1992 . – MHNG; male holotype of Kenocymbium deelemanae Millidge & Russel-Smith, 1992 .

Etymology: The specific epithet is a noun in apposition referring to the “terra typica”, the Jambi Province.

Diagnosis: The new species is characterized by the strongly reduced distal part of the paracymbium, by the thick and long embolus, as well as by the presence of a long, downward-directed process on the convector .

Description: Male (holotype). Medium-sized Linyphiinae , total length 2.30, habitus as shown in Fig. 9 . Carapace 1.05 long, 0.80 wide, unmodified, reddish brown, with darkened cephalic part and indistinct grey radial stripes as well as with darker margin; sulci absent. Chelicerae 0.50 long, mastidion absent. Legs reddish brown, end of segments darkened. Fe I 1.50 long. Leg IV 3.95 long (1.05+0.25+0.95+1.10+0.60). Chaetotaxy. FeI: 1-2- 0-0, II-IV: 1-0-0-0; TiII: 2-1-1-0, III: 2-0-0-1, IV: 2-1- 0-0. TmI 0.22. Metatarsus IV without trichobothrium. Palp ( Figs 10 , 19-21 ): Proximal part of paracymbium triangular and projecting forwards, distal part short, narrow, slightly curved, transparent, poorly visible. Distal suprategular apophysis small, claw-shaped.

Embolus thick, slightly bent. Embolic membrane a long, narrow stripe. Radix large, flat, with a long apophysis directed downwards. Abdomen 1.20 long, 0.70 wide, dorsal pattern as shown in Fig. 9 .

Female. Unknown.

Taxonomic remarks: The new species is similar to Prosoponoides hamatum , known from northern Sumatra, but clearly differs by a twice shorter distal part of the paracymbium (not shown on palp illustrations of P. hamatum in Millidge & Russel-Smith, 1992 ), as well as by its thick embolus and the presence of a specific process on the convector .

Distribution: Known only from the type locality on Sumatra Island, Indonesia.

Figures

Figs 1 - 10. Photographs of Dumoga buratino sp. nov., male and female paratypes (1 - 8), and of Prosoponoides jambi sp. nov., male holotype (9 - 10). (1, 9) Male habitus, dorsal view. (2 - 3) Male cephalothorax, lateral and dorsal view, respectively. (4) Female habitus, dorsal view. (5 - 6) Female abdomen, ventral and lateral view, respectively. (7 - 8) Epigyne, ventral and dorsal view, respectively. (10) Palp, retrolateral view.

Figs 11 - 21. Dumoga buratino sp. nov., male and female paratypes (11 - 18), and Prosoponoides jambi sp. nov., male holotype (19 - 21). (11, 19) Right palp, retrolateral view. (12) Palpal tibia, dorsal view. (13) Paracymbium. (14) Distal suprategular apophysis. (15) Distal suprategular apophysis and embolic division. (16 - 18) Epigyne, ventral, dorsal and lateral view, respectively. (20) Cymbium and palpal organ of right palp, prolateral view. (21) Embolic division, ventral view.