A new erigonine genus and species from West Malaysia (Araneae: Linyphiidae)
Author
Tanasevitch, Andrei V.
text
Raffles Bulletin of Zoology
2018
2018-07-23
66
408
412
journal article
10.5281/zenodo.5359317
2345-7600
5359317
B8CB6A99-9E90-457E-BEBD-02BBFA9EF4A9
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;
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.
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
.