Gorbothorax, V. & Tanasevitch, 2011

Tanasevitch, Andrei V., 2011, Linyphiid spiders (Araneae, Linyphiidae) from Pakistan and India, Revue suisse de Zoologie 118 (3), pp. 561-598 : 573-577

publication ID

https://doi.org/ 10.5962/bhl.part.117817

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gen. nov.

Gorbothorax aff. ungibbus Tanasevitch, 1998 Figs 47-52

MATERIAL: 1 Ƌ, INDIA, Meghalaya, 15 km N of Darugiri, Garo-Hills , 400 m a.s.l., forest, sifting litter in ravine; 4.XI.1978; leg. C. Besuchet & I. Löbl [40b].

DESCRIPTION: Male. Total length 1.63. Carapace 0.80 long, 0.63 wide, unmodified, yellow. Chelicerae 0.30 long, unmodified. Legs pale yellow. Leg I 2.92 long (0.75+0.25+0.75+0.70+0.47), IV 2.95 long (0.80+0.25+0.75+0.75+0.40). Chaetotaxy and trichobothriotaxy unclear: spines mostly lost, but should be, all metatarsi with a trichobothrium. Palp as shown in Figs 47-52. Abdomen 0.78 long, 0.53 wide, white with ambiguous pale grey pattern.

REMARKS: The male shows strong similarities to G. ungibbus Tanasevitch, 1998 , described from Nepal ( Tanasevitch, 1998), but differs by some small details of palp structure. Each form is known from a single male, so it is impossible to say now if the differences are due to variability of characters or if these males belong to distinct but closely related species.

DISTRIBUTION: Known from a single locality in northern India.

FIGS 42-46

Gongylidioides pectinatus sp. n., Ƌ paratype. (42-43) Right palp, retrolateral and prolateral views, respectively. (44) Palpal tibia, prolateral view. (45) Palpal tibia and paracymbium, retrolateral view. (45) Embolic division.

Halorates concavus sp. n. Figs 53-57 HOLOTYPE: Ƌ, PAKISTAN, Swat District , above Utrot, 2600 m a.s.l., wet clearing in

Abies & Cedrus forest, sifting mosses & rotten litter; 13.V.1983; leg. C. Besuchet & I. Löbl [11d].

PARATYPE: 1 Ƌ, Swat District, above Utrot, 2500-2600 m a.s.l., Abies & Cedrus forest,

sifting rotten wood litter; 14. VI.1983 ; leg. C. Besuchet & I. Löbl [12c]. COMPARATIVE MATERIAL EXAMINED: Collinsia japonica, SMF 31674, 4 ♀, NEPAL ,

southern part of Annapurna Massive, Pass Gorapani , 2700-2800 m a.s.l.; 23.II.1974; leg J. Martens. – SMF 31670, 2 View Materials Ƌ, southern part of Dhaulagiri Massive, Dhorpatan , 3000 m a.s.l.; FIGS 47-52

Gorbothorax aff. ungibbus Tanasevitch, 1998 . (47-48) Right palp, retrolateral and prolateral views, respectively. (49-50) Palpal tibia, dorsal and prolateral views, respectively. (51) Distal suprategular apophysis and embolus. (52) Distal suprategular apophysis and embolic division.

24.V .1973 ; leg J. Martens. – SMF 31671, 1 ♀, vestern part of Dhaulagiri Massive, trail from Dhorpatan to Tarakot , 3100-3600 m a.s.l.; 30.V .1973 ; leg J. Martens. – SMF 31672, 2 ♀, northern part of Dhaulagiri Massive, Dolpo, Tal Valley above Barbung Khola , Charka , 4300 m a.s.l.; 24.-29.VI .1973 ; leg. J. Martens. – SMF 31673, 1 View Materials Ƌ, Thakkhola, Kali-Gandaki Valley, Chadziou-Khola Valley near Ghasa , 2600 m a.s.l.; IX.1969; leg J. Martens. All identified by J. Wunderlich in 1979 .

ETYMOLOGY: The specific name is a Latin adjective meaning “concave”, “cupped” referring to the shape of the embolus.

FIGS 53-57

Halorates concavus sp. n., Ƌ holotype. (53-54) Right palp, retrolateral and ventral views, respectively. (55) Palpal tibia, dorsal view. (56) Distal suprategular apophysis. (57) Embolic division.

DIAGNOSIS: The new species is characterized by the peculiar shape of its embolus.

DESCRIPTION: Male (holotype). Totallength 2.03. Carapace 1.00 long, 0.80 wide, unmodified, reddish brown. Chelicerae 0.35 long, with small pointed frontal tooth. Legsreddishbrown. LegI 2.54 long (0.70+0.25+0.58+0.58+0.43), IV 2.58 long (0.70+0.23+0.65+0.60+0.40). Chaetotaxy, spinesweak, theirlengthabout 1-1.5 diameter of segment. TmI 0.44. Metatarsus IV without trichobothrium. Palp (Figs 53-57): Tibia abruptly narrowed distally, ending with a tapering transparent membranous process. Posterodorsal cymbial outgrowth keel-shaped, with a shallow saddle. Distal suprategular apophysis flat, spatulate, with a narrow membrane distally. Radical part of embolic division with two serrate lobes and a strongly sclerotized tooth-shaped outgrowth; embolus flat and wide, with claw-shaped tip. Abdomen 1.13 long, 0.75 wide, dark grey.

Female unknown.

TAXONOMIC REMARKS: The new species appears to be most similar to H. crassipalpis ( Caporiacco, 1935) known from the Karakorum ( Caporiacco, 1935; Thaler, 1987), but differs well by the larger size and by the unequal posterodorsal outgrowth of the cymbium, as well as by the claw-like distal part of the embolus, and also by the shape of the serrated lobes of the radical part of the embolic division. The new species clearly differs from H. japonica (Oi, 1964) (see Wunderlich, 1983), the only congener that also occurs in the Himalayas, by the shorter and wider lobes of the embolic division.

VARIABILITY. Details of the both palps in both males examined look identical.

DISTRIBUTION: Known from the type locality only.


Mykotektet, National Veterinary Institute


Forschungsinstitut und Natur-Museum Senckenberg













Tanasevitch, Andrei V. 2011


V. & Tanasevitch 2011

aff. ungibbus

Tanasevitch 1998
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