Nasoona kinabalu, Tanasevitch, 2018

Tanasevitch, Andrei V., 2018, A survey of the genus Nasoona Locket, 1982 with the description of six new species (Araneae, Linyphiidae), Revue suisse de Zoologie 125 (1), pp. 87-100 : 91-93

Nasoona kinabalu sp. nov.

Figs 9 , 18-19 , 49-55

Holotype: Male ; EAST MALAYSIA, Borneo, Sabah, Kinabalu N.P., Mt Kinabalu , below Layang-Layang, 2600 m a.s.l., interception trap; 2.-8.V.1987; leg. A. Smetana [#B20].

Paratypes: 1 male; Mt Kinabalu , below Layang-Layang, 2595 m a.s.l.; 2. V.1987; leg. A. Smetana [#B19]. – 1 male, 3 females; Mt Kinabalu , 2590 m a.s.l., humid ravine below Layan Layang, cloud forest, sifting leaf litter in humid ravine; 1. V.1987; leg. D. Burckhardt & I. Löbl [#10a]. – 1 male, 1 female; Mt Kinabalu , 3150-3200 m a.s.l., humid Myrtaceae and Ericaceae forest, sifting moss and fern near Paka cave, near river; 3. V.1987; leg. D. Burckhardt & I. Löbl [#12b].

Diagnosis: The species appears to be most similar to N. sabah sp. nov., and differs by the shorter retrolateral outgrowth of the male palpal tibia, by the shape of the paraconvector, as well as by the presence of a bipartite visor-like structure above the epigynal cavity.

Etymology: The specific epithet is a name in apposition referring to the “terra typica”, Mt Kinabalu on Borneo.

Description:

Male (paratype from Mt Kinabalu, 2590 m a.s.l.): Total length 1.90. Carapace 0.95 long, 0.75 wide, pale brown, with grey radial stripes and a narrow margin. Postocular elevation bearing bent, forwarddirected stout spines as shown in Fig. 9 ; eyes normal. Chelicerae 0.95 long, unmodified. Legs pale brown. Leg I 3.63 long (1.00+0.25+0.95+0.83+0.60), IV 3.66 long (1.03+0.25+0.93+0.85+0.60). Chaetotaxy: 2.2.1.1, length of spines about 1.5-2.5 diameters of leg segment. Each metatarsus with a trichobothrium. TmI 0.70. Palp ( Figs 49-53 ): Tibia relatively short, its retrolateral branch wide, with several very short spinules terminally and with a black, rounded tubercle on its inner side. Prolateral branch well-sclerotized, dagger-shaped. Paracymbium widened distally, ending in a hook. Distal suprategular apophysis short, flat, with a shallow distally and with a black, sharp tooth in middle. Embolus long and thin, forming a loop, radix reduced. Main body of convector narrow, curved; its distal apophysis black, well sclerotized, serrate, rounded apically. Paraconvector massive, complicated, serrate; distal process distinctly protruded. Abdomen 1.00 long, 0.60 wide, dorsally white, with three longitudinal pairs of large, grey spots.

Female (paratype from Mt Kinabalu, 2590 m a.s.l.): Total length 2.52. Carapace 1.00 long, 0.85 wide, pale greyish brown, with grey radial stripes and a narrow margin; unmodified. Chelicerae 0.45 long, unmodified. Legs pale brown. Leg I 3.90 long (1.05+0.30+1.03+0.90+0.62), IV 4.11 long (1.15+0.30+1.03+1.05+0.58). Chaetotaxy: 2.2.1.1, length of spines about 1.5-2.5 diameters of leg segment. Each metatarsus with a trichobothrium. TmI 0.71. Epigyne ( Figs 18-19 , 54-55 ): Anterior wall with a bipartite visor-like outgrowth overhanging epigynal cavity. Seminal ducts wide, shaped like a question mark, receptacles beanlike. Abdomen 1.50 long, 1.15 wide, dorsally with two rows of almost merged grey spots.

Distribution: Only known from highlands of Mt Kinabalu on Borneo, East Malaysia.

Figures

Figs 1-16. Photographs of Nasoona indianа sp. nov., male holotype (1-3); N. orissa sp. nov., male paratype (4); N. intuberosa sp. nov., male paratypes (5-7) and female paratype (8); N. kinabalu sp. nov., male holotype (9); N. sabah sp. nov., male paratype from Liwagu Trail (10-12) and male paratype from Silau-Silau Trail (13); N. sulawesi sp. nov., male holotype (14-16).

Figs 17-27. Photographs ofNasoona intuberosa sp.nov., female paratype (17); N. kinabalu sp. nov., female paratype from Mt Kinabalu, 3150-3200 m (18) and female paratype from Mt Kinabalu, 2590 m (19); N. sabah sp. nov., female paratype from Silau- Silau Trail (20) and female paratype from Liwagu Trail (21); N. comata (Tanasevitch, 1998), specimens from Hellok, Nepal (22-27). (17-21, 24) Female abdomen, ventral view. (22) Male body, dorsal view. (23) Male prosoma, lateral view. (25-26) Female abdomen, dorsal view. (27) Epigyne, ventral view. Not to scale.

Figs 49-55. Nasoona kinabalu sp. nov., male and female paratypes from Mt Kinabalu, 2590 m. (49-50) Right palp, retrolateral and prolateral view, respectively. (51) Palpal tibia, dorsal view. (52) Distal suprategular apophysis and embolic division. (53) Convector, paraconvector and distal part of embolus. (54) Epigyne, ventral view. (55) Cleared epigyne, dorsal view.