Javanaria, Tanasevitch, 2020

Tanasevitch, Andrei V., 2020, On linyphiid spiders from Java, Indonesia, with the description of three new genera and four new species (Araneae: Linyphiidae), Revue suisse de Zoologie 127 (1), pp. 63-74 : 64-66

Javanaria gen. nov.

Type species: Javanaria gracilipes sp. nov.

Etymology: The generic name is a combination of two words: “ Java ”, the “terra typica”, and a part of the generic name Nasoonaria . Males of Nasoonaria , like males of the type species of the new genus, have an extremely developed distal suprategular apophysis. The gender of the new name is feminine.

Diagnosis: The genus contains large-sized erigonines with relatively long and slender legs, with a total length of 2.2-2.3, which are characterized by the following combination of somatic and genitalic characters:

1) Carapace slightly modified, eyes somewhat enlarged, cephalic pits (= sulci) absent ( Figs 5-6 ).

2) Abdomen with a dorsal pattern ( Fig. 5 ).

3) Legs relatively long and slender.

4) Chaetotaxy formula 2.2.1.1; each metatarsus with a trichobothrium; TmI 0.52-0.60.

5) Palpal tibia unmodified.

6) Paracymbium long and narrow ( Fig. 15 ).

7) Median membrane strongly reduced.

8) Distal suprategular apophysis extremely developed, massive ( Figs 15, 18 ).

9) Radix strongly reduced, embolus relatively wide, flat, convector absent ( Figs 19-20 ).

Species included: Only the type species, Javanaria gracilipes sp. nov.

Taxonomic remarks: In its large size and long legs J. gracilipes sp. nov. resembles some taxa of the subfamilies Linyphiinae and Micronetinae , but its palpal conformation is of the classically erigonine-type. The palp of J. gracilipes sp. nov. somewhat resembles that of Nasoonaria . However, this similarity is superficial, mainly due to the large distal suprategular apophysis. Today its is impossible to find a genus among the known erigonines to which Javanaria gen. nov. appears to be close. Most likely the closest relatives will be found among taxa not yet described.

Distribution: Known only from the type locality on Java, Indonesia.

Figures

Figs 1-9. Photographs of males: the holotype of Javagone maribaya sp. nov. (1-4), the paratype of Javanaria gracilipes sp. nov. (5-6) and the holotype (7) and both paratypes (8-9) of Javanyphia gede sp. nov. (1, 5, 8-9) Habitus, dorsal view. (2, 6-7) Prosoma, lateral view. (3) Prosoma, frontal view. (4). Prosoma, dorsal view.

Figs 15-20. Details of male palp structure of Javanaria gracilipes sp. nov., paratype. (15-16) Right palp, retrolateral and prolateral views, respectively.(17) Palpal tibia, paracymbium and proximal part of cymbium, dorsal view. (18) Distal part of embolus and distal suprategular apophysis, ventral view. (19) Embolic division, ventral view. (20) Distal suprategular apophysis, median membrane and embolic division, dorso-lateral view.