Parbatthorax unicornis, Tanasevitch & Online & Version, 2019

Tanasevitch, Andrei V., Online, Published & Version, Final, 2019, A new erigonine genus from the Nepal Himalayas (Araneae, Linyphiidae) *, Turkish Journal of Zoology 43, pp. 229-232 : 230-232

Parbatthorax unicornis sp. nov. ( Figures 1–8 )

Etymology. The specific name in Latin is an adjective referring to the presence of a horn-shaped spine on the frontal surface of the male carapace.

Holotype. Male (SMF), Nepal, Parbat District, between Chitre and Ghandrung, from Chitre to passes, rich deciduous forest, 4.V.1980, J. Martens and A. Ausobsky leg. [#170].

Diagnosis. See above under the generic description.

Description. Male holotype. Total length 1.75. Carapace 0.88 long, 0.65 wide, dirty pale brown, modified as shown in Figures 1 and 2. A short, stout, apically slightly curved spine between anterior median eyes. Chelicerae 0.25 long, unmodified. Legs yellow to pale brown. Leg I, 2.31 long (0.65+0.18+0.53+0.55+0.40), IV, 2.41 long (0.70+0.20+0.55+0.63+0.33). Chaetotaxy 2.2.1.1, spines about 1.5–2 as long as segment’s diameter. TmI 0.78. Each metatarsus with a trichobothrium. Palp as shown in Figures 3–8 : Tibia highly modified, in addition to two apical outgrowths, with a sharp anterodorsal tooth. Distal part of paracymbium bifurcate, one process narrow,

hook-shaped, the other slightly curved, tooth-like. Distal suprategular apophysis highly developed, S-shaped, conducting the distal part of embolus. Median membrane completely reduced. Radical part of embolus relatively small, rounded; embolus flat, bent near its base and directed forward. Convector present, elongated, stretched along palp axis, its distal apophysis (DAC in Figures 4–6 ) sharpened in lateral aspect. Abdomen 1.00 long, 0.70 wide, dark gray dorsally, with a white herring-bone pattern as shown in Figure 2.

Female unknown.

Distribution. Known only from the type locality in Himalayas of Nepal.

Figures

Figures 1 and 2. Male body of Parbatthorax unicornis sp. nov., holotype. 1- Lateral view; 2- Dorsal view. Scale bar = 0.5 mm.

Figures 3–8. Left palp details of Parbatthorax unicornis sp. nov., holotype. 3, 4- Palp, retrolateral and prolateral views, respectively; 5, 6- Embolic division and distal suprategular apophysis, prolateral and retrolateral views, respectively; 7- Palpal tibia, dorsal view; 8- Paracymbium, lateral view. Scale bar = 0.1 mm.