Pahangone, Tanasevitch, 2018

Tanasevitch, Andrei V., 2018, A new erigonine genus and species from West Malaysia (Araneae: Linyphiidae), Raffles Bulletin of Zoology 66, pp. 408-412 : 408-410

Pahangone , new genus

Type species. Pahangone mirabilis , new species.

Etymology. The generic name is a combination of two words: “ Pahang ”, the country of origin, and a part of the generic name Erigone . The gender of the genus name is masculine.

Diagnosis. The new genus belongs to the subfamily Erigoninae and is characterised by the following peculiar combination of characters, both somatic and genital:

1) relatively large-sized erigonines, total length 2.25–2.30 mm;

2) male carapace slightly modified (see Figs. 1, 2 );

3) abdomen with a dorsal pattern in both sexes;

4) legs relatively long and thin;

5) chaetotaxy 2.2.1.1; 6) all metatarsi with a trichobothrium; TmI close to 0.50; 7) cymbium and palpal tibia highly modified (see Figs.

10–14); 8) distal suprategular apophysis highly developed and strongly sclerotised; 9) embolus short, bent; radix membranous; 10) epigyne prominent, cavity covered with a plate (see

Figs. 5–9 ).

Among the genera that share the same chaetotaxy formula, 2.2.1.1, there is none similar to the new genus through this combination of characters. Habitually, i.e., based on the relatively long and slender legs, Pahangone , new genus resembles both Hylyphantes Simon, 1884 and Gladiata Zhao & Li, 2014 , but genitalic conformation is absolutely different. A highly developed distal suprategular apophysis is known in many genera, e.g., the Savignia genus-group in the sense of Millidge (1977) and some other genera, but Pahangone mirabilis , new species shows no real similarity to any of such taxa based on other genitalic structures. At present, it is too difficult to outline the closest relatives of this genus and perhaps such may be found among some other new Southeast Asian erigonines.

Description. See below under species description.

Species included. Only the type species, Pahangone mirabilis , new species.

Distribution. Malay Peninsula, West Malaysia.

Figures

Figs. 1–9. Pahangone mirabilis, new species, male holotype (1, 2) and female paratype (3–9). 1, 2, 5, body, lateral (1, 5) and dorsal (2) views; 3, 4, abdomen, dorsal and ventral views, respectively; 6, 7, epigyne, ventral view, different aspects; 8, 9, epigyne, lateral and posteroventral views, respectively.

Figs. 10–17. Palp of Pahangone mirabilis, new species, male holotype. 10, right palp, retrolateral view; 11, 12, palpal tibia and paracymbium, lateral and retrolateral views, respectively; 13, 14, palpal tibia, posterodorsal and dorsal views, respectively; 15, distal suprategular apophysis, lateral view; 16, distal suprategular apophysis and embolus, lateral view; 17, distal suprategular apophysis and embolic division, anterolateral view.