Nasoona sulawesi, 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 : 96

Nasoona sulawesi sp. nov.

Figs 14-16 , 64-69

Holotype: Male ; INDONESIA, northern Sulawesi, Kotamobagu, Matali Baru , road to Torosik, Mt Tongara, 600-900 m a.s.l.; 5.XII.1999; leg. A. Riedel.

Other material examined: Male holotype and 2 females paratypes of Nasoona silvestris Millidge, 1995 from Sumba Island , Indonesia .

Diagnosis: The new species appears most similar to the Neotropical N. coronata , known from San Esteban N.P., Venezuela. This similarity is seen the palpal structure, namely in the shape of the large, strongly sclerotized convector and paraconvector. Nasoona sulawesi sp. nov. is also somewhat similar to N. crucifera , which is widespread in the Oriental Region ( World Spider Catalog, 2017) and to N. silvestris , described from Sumba, Indonesia ( Millidge, 1995). Nasoona sulawesi sp. nov. is distinguished from the above-mentioned species by the shape of the strongly modified palpal tibia and by details of the palpal sclerites.

Etymology: The specific epithet is a name in apposition referring to the “terra typica”, Sulawesi Island.

Description:

Male (holotype): Total length 1.83. Carapace 0.85 long, 0.70 wide, greyish brown, with a postocular elevation bearing bent, stout spines as shown in Figs 14-16 ; occipital region of elevation with a small hollow bearing very short hairs as shown in Fig. 15 ; eyes normal. Chelicerae 0.30 long, unmodified. Legs yellow. Leg I 3.06 long (0.85+0.23+0.83+0.75+0.50), IV 3.14 long (0.85+0.23+0.80+0.78+0.48). Chaetotaxy: 2.2.1.1, length of spines about 1.5-2.5 diameters of leg segment. Each metatarsus with a trichobothrium. TmI 0.53. Palp ( Figs 64-69 ): Tibia divided into four parts of different shapes. Dorsal branch of palpal tibia with several very short spinules terminally. Proximal part of paracymbium narrow, L-shaped; distal part wide, bearing several weak spines, ending with a hook. Distal suprategular apophysis short, flat, rounded distally, with a sharp black tooth in middle. Embolus long and thing, forming a loop; radix reduced. Main body of convector massive, black, distally divided by a narrow cleft into two parts, these serrate distally. Paraconvector large, complicated, with a long, claw-shaped distal process. Abdomen 1.01 long, 0.65 wide, dorsally dark grey, with a white, median stripe as shown in Fig. 14 .

Female. Unknown.

Distribution: Only known from the type locality in northern Sulawesi, Indonesia.

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 64-74. Nasoona sulawesi sp. nov., male holotype (64-69) and N. locketi Millidge, 1995, male paratype from NHML (70-74). (64- 65) Right palp, retrolateral and prolateral view, respectively. (66-67) Palpal tibia, dorsal and prolateral view, respectively. (68) Palpal tibia and paracymbium, retrodorsal and slightly proximal view. (69) Distal suprategular apophysis. (70-71) Distal part of palp, retrolateral and prolateral view, respectively. (72) Convector. (73-74) Palpal tibia, dorsal and prolateral view, respectively.