Tegulinus sumatranus, 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 : 149-152

Tegulinus sumatranus sp. nov.

Figs 52-55 , 60-64

Holotype: Male; Indonesia, Sumatra, Jambi Province, Mt Kerinci , 3300 m a.s.l., low Ericaceae scrub, sifting of vegetational debris; 12.XI.1989; leg. D. Burckhardt, I. LöbI & D. Agosti [#12a].

Paratypes: 1 male; collected together with the holotype. – 1 male; Mt Kerinci, 2100 m a.s.l., vegetational debris, transition upper montane Lithocarpus & Castanopsis to moss forest, sifting; 14.XI.1989; leg. D. Burckhardt, I. LöbI & D. Agosti [#16]. – 1 male; Mt Kerinci, footpath to summit, N of Kersik Tua, 1800-1980 m a.s.l., montane rain forest, sifting; 16.II.2000; leg. P. Schwendinger [Sum-00/12]. – 3 males; 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]. – 2 males; Jambi Province, Mt Tujuh, footpath to Lake Mt Tujuh, 1500-2000 m a.s.l., montane rain forest; 20.II.2000; leg. P. Schwendinger [Sum-00/15].

Etymology: The specific epithet, an adjective, refers to the “terra typica”, Sumatra Island.

Diagnosis: The species is characterized by the weakly modified carapace, and the presence of a specific process on the palpal tibia.

Description: Male (paratype from Mt Tujuh). Total length 2.15, habitus as shown in Figs 52-53 . Carapace ( Fig. 53 ) 1.05 long, 0.75 wide, pale yellowbrown, convex dorsally, with indistinct, grey, radial stripes posteriorly; sulci absent. Chelicerae 0.38 long, mastidion absent. Legs yellow. Leg I 3.52 long (1.00+0.28+0.88+0.83+0.53), leg IV 3.34 long (0.95+0.25+0.78+0.88+0.48). Chaetotaxy 2.2.1.1, length of spines about 1.5-2 diameters of segment. TmI 0.77. All metatarsi with trichobothrium. Palp ( Figs 54-55 , 60-64 ): Tibia with a wide apophysis ending in a long, narrow, spear-like process. Paracymbium L-shaped, its distal part bearing several spines. Tegulum conical, strongly protruded downwards, pointed and bent apically. Distal suprategular apophysis relatively long, its distal part almost transparent. Convector relatively wide, triangular. Embolus small, commashaped, embolic membrane narrow, moderately sclerotized. Abdomen 1.00 long, 0.75 wide, dorsal pattern as shown in Fig. 52 .

Female. Unknown.

Taxonomic remarks: The new species is similar to its only known congener, Tegulinus bifurcatus sp. nov. (see below).

Distribution: Known only from two localities in the mountains of Jambi Province, Sumatra Island, Indonesia.

Figures

Figs 52 - 59. Photographs of Tegulinus sumatranus sp. nov., male paratype from Mt Tujuh (52 - 55), and of T. bifurcatus sp. nov., male holotype (56 - 59). (52 - 53, 56) Habitus. (57) Cephalothorax, lateral view. (54, 58) Right palp, retrolateral view. (55, 59) Palpal tibia, dorsal view.

Figs 60 - 69. Tegulinus sumatranus sp. nov., male paratype from Mt Tujuh (60 - 64), and T. bifurcatus sp. nov., male holotype (65 - 69). (60, 65) Right palp, retrolateral view. (61, 66, 67) Right palp, prolateral view. (62, 68) Palpal tibia, dorsal view. (63) Distal suprategular apophysis. (64) Embolic division. (69) Distal suprategular apophysis and embolus.