Dumoga buratino, 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

Dumoga buratino sp. nov.

Figs 1-8 , 11-18

Holotype: Male; Indonesia, Sumatra, Jambi Province, 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].

Paratypes: 1 male, 2 females; collected together with the holotype.

Diagnosis: The new species is characterized by the peculiar shape of its carapace and highly modified palpal tibia in the male, as well as by the rounded dorsal plate of the epigyne in the female.

Etymology: The specific epithet is a noun in apposition, referring to the long-nosed Russian fairy-tale character “Buratino”.

Description: Male (paratype). Large-sized Erigoninae , total length 3.13, habitus as shown in Fig. 1 . Carapace modified ( Figs 2-3 ), 1.65 long, 1.00 wide, reddish brown, with a pale, globular elevation in the middle. Anterior part of carapace protruded forwards, bearing anterior median eyes. Sulci situated at base of central globular outgrowth. Chelicerae 0.63 long, mastidion absent, anterior margin of fang groove with 5 strong teeth. Legs pale reddish brown. Leg I 6.93 long (1.95+0.35+1.78+1.55+1.30), leg IV 5.78 long (1.80+0.28+1.45+1.38+0.87). Chaetotaxy 2.2.1.1, length of spines about 2 diameters of segment. TmI 0.40. All metatarsi with trichobothrium. Palp ( Figs 11-15 ): Tibia massive, highly modified. Proximal part of paracymbium narrow, middle part with a large rounded outgrowth, distal part hook-shaped. Suprategular apophysis complex, with several outgrowths. Column relatively large, looking like a spongy membraneous tissue. Median membrane narrow, protruded forwards. Radix very small, embolus thin, long, making two loops. Abdomen 1.50 long, 1.00 wide, dorsally pale, with several dark spots as shown in Fig. 1 .

Female. Total length 2.75, habitus as shown in Fig. 4 . Carapace 1.33 long, 1.00 wide, unmodified, reddish brown, with a pale spot in the middle. Chelicerae 0.63 long, anterior margin of fang groove with 5 strong teeth. Legs reddish brown. Leg I 6.34 long (1.68+0.38+1.65+1.53+1.10), leg IV 5.18 long (1.50+0.33+1.35+1.30+0.70). Chaetotaxy as in male. TmI 0.44. Abdomen 1.50 long, 1.05 wide, dorsal pattern as shown in Fig. 4 . Epigyne ( Figs 5-8 , 16-18 ) prominent, aperture lacking, dorsal plate rounded, receptacles elongated.

Taxonomic remarks: The new species seems to be most similar to D. complexipalpis Millidge & Russell- Smith, 1992, known from males, but clearly differs by the shape of its carapace, by the arrangement of apophyses on the palpal tibia, as well as by the shape of the distal suprategular apophysis.

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.