Erigone sumatrana, Tanasevitch, Andrei V., 2017

Tanasevitch, Andrei V., 2017, New species and new records of linyphiid spiders from the Indo-Malayan Region (Araneae, Linyphiidae), Zootaxa 4227 (3), pp. 325-346 : 333

publication ID

https://doi.org/ 10.11646/zootaxa.4227.3.2

publication LSID

lsid:zoobank.org:pub:C740FE23-33BC-41D3-9684-C9D845A8EB7B

DOI

https://doi.org/10.5281/zenodo.6027806

persistent identifier

https://treatment.plazi.org/id/03FDD960-F658-8E32-94F7-DD88E370FC6E

treatment provided by

Plazi

scientific name

Erigone sumatrana
status

sp. nov.

Erigone sumatrana View in CoL new species

Figs 3 View FIGURES 1 – 7 , 19–25 View FIGURES 19 – 25

Holotype male ( MHNG), INDONESIA, Sumatra, Jambi Province, Mt Kerinci, footpath to summit, W of Kersik Tua , 2160 m a.s.l., evergreen hill forest, sifting ; 17–18.II.2000; P. Schwendinger leg. [Sum-00/13]. One male paratype (MHNG), collected together with the holotype.

Etymology. The specific name is an adjective referring to the island where the types were collected.

Diagnosis. The new species is most similar to Erigone apophysalis n. sp. (see above), but differs by the presence of a ventro-apical apophysis on the palpal patella, by the peculiar shape of the palpal tibia, by the smaller posterior radical apophysis of the embolic division, as well as by the thin, sharp, backwards-directed embolus. Both new species, E. apophysalis n. sp. and E. sumatrana n. sp., as well as another Oriental congener, E. bifurca , are diagnosed by the untypical chaetotaxy formula, 2.2.1.1 versus 2.2.2.1.

Description. Male paratype. Small Erigoninae , total length 1.38. Carapace convex in anterior part ( Fig. 3 View FIGURES 1 – 7 ), 0.73 long, 0.75 wide, reddish brown, no teeth at edge of carapace. Chelicerae 0.35. long, with a mastidion (large tooth on frontal part of paturon)and one tooth (two in holotype) on anterior lateral surface in distal part of chelicera. Legs pale brown. Leg I, 1.86 long (0.55+0.20+0.43+0.39+0.29), IV, 1.77 long (0.55+0.18+0.43+0.35+0.26). Chaetotaxy 2.2.1.1. TmI 0.50. Metatarsi IV without trichobothrium. Palp ( Figs 19–25 View FIGURES 19 – 25 ): Ventro-apical apophysis on patella small, pointed, slightly curved. Palpal tibia relatively short and wide, lower outgrowth narrowing medially, roundly expanded distally. Paracymbium L-shaped, its distal part relatively narrow. Distal suprategular apophysis flat and wide. Embolic division with a flat, massive posterior radical apophysis and a small mesal radical tooth. Median radical tooth absent. Embolic membrane long and narrow, sabre-shaped. Embolus proper small, thin, directed backward. Abdomen 0.80 long, 0.55 wide, dark grey.

Female. Unknown.

Distribution. Only known from the type locality on Sumatra.

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

Genus

Erigone

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