Parameioneta javaensis, 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 : 69-70

Parameioneta javaensis sp. nov.

Figs 26-31

Holotype: MHNG; male [sample JB-89/02]; INDONESIA, Java, West Java Province, 8 km N of Bandung, Taman Hutan Raya Juanda (Forest Conservation Park), Winkler extraction; 13.X.1989; leg. J. Robert.

Etymology: The specific epithet is a name in apposition referring to the island where the types of this species were collected.

Diagnosis: The new species is well distinguished by the presence of a sharp, dorsal tooth on the palpal tibia, by the absence of a pit hook (after Saaristo, 1973) on the distal suprategular apophysis, as well as by the specific shape of the paracymbium, lamella characteristica and embolus.

Description: Male holotype. Total length 1.40. Carapace unmodified, 0.65 long, 0.50 wide, greyish yellow. Eyes not enlarged, normal in size. Chelicerae 0.25 long, mastidion absent. Legs pale yellow. Leg I 2.04 long (0.53 + 0.18 + 0.53 + 0.50 + 0.30), leg IV 2.03 (0.55 + 0.13 + 0.50 + 0.50 + 0.35). Chaetotaxy 2.2.2.2. Length of spines 1-2 diameters of corresponding leg segment. Mt I-III with a trichobothrium each. TmI 0.21. Palp ( Figs 26-31 ): Patella with a curved dorsal spine. Tibia with a small, sharp tooth dorsally. Paracymbium V-shaped, its distal part weakly sclerotized, almost transparent. Distal suprategular apophysis short and rounded, pit hook absent. Median membrane short and wide. Lamella characteristica long, widened distally and ending in two long, dark, stylet-shaped branches, upper branch with split apex. Terminal apophysis long, cylindrical, narrowing distally. Embolus with a long and narrow main body, embolus proper bifid terminally, branching off below apex of main body ( Fig. 31 ). Abdomen 0.70 long, 0.45 wide, pale grey.

Female. Unknown.

Taxonomic remarks: The new species is similar to Maorineta sulawesi Tanasevitch, 2012 , described from both sexes from Sulawesi, Indonesia ( Tanasevitch & Stenchly, 2012). In the description the authors pointed out that M. sulawesi is clearly distinguished from other known congeners. Indeed, the palp structure of M. sulawesi is quite different from that of other Maorineta Millidge, 1988 , namely by the clearly differentiated sclerites in the embolic division, and this kind of conformation rather corresponds to Parameioneta Locket, 1982 . Thus, I here transfer M. sulawesi to Parameioneta . Parameioneta javaensis sp. nov. clearly differs from P. sulawesi comb. nov. by a smaller dorsal tooth on the palpal tibia, by the absence of a pit hook, as well as by the shape of the lamella characteristica and of the embolus ( Figs 30-31 cf. Tanasevitch & Stenchly, 2012: figs 11-13).

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

Range: Javanese.

Figures

Figs 26-31. Details of male palp structure of Parameioneta javaensis sp. nov. (26) Right palp, retrolateral view. (27) Paracymbium, lateral view. (28) Palpal tibia, dorsal view. (29) Embolic division, ventro-lateral view. (30) Lamella characteristica, ventrolateral view. (31) Embolus, ventro-lateral view.