Lathrobium aculeatum COIFFAIT, 1982

Assing, Volker, 2014, New species and records of Lathrobium from the Palaearctic region, primarily from Nepal (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology 64 (1), pp. 1-28 : 21-23

publication ID

https://doi.org/ 10.21248/contrib.entomol.64.1.1-28

persistent identifier

https://treatment.plazi.org/id/03FF87F6-FFB1-FFA0-FC88-8D698A13FED8

treatment provided by

Carolina

scientific name

Lathrobium aculeatum COIFFAIT, 1982
status

 

Lathrobium aculeatum COIFFAIT, 1982 View in CoL

( Figs 123–129 View Figs 115–129 , Map 2 View Map 2 )

Material examined: Nepal: 22 , 6  [partly teneral], W-Dhaulagiri, N-slope of Jungla pass, 28°52'N, 82°58'E, 3400–3800 m, 12.IX.2012, leg. Schmidt ( NME, cAss); 4 , 4  [partly teneral], W-Dhaulagiri, above Tara- GoogleMaps

kot, 28°51'N, 82°59'E, 3050 m, 10.IX.2012, leg. Schmidt ( NME, cAss) GoogleMaps .

Comment: The redescription in ASSING (2012) is based only on two type specimens in rather poor condition. The above specimens render a more accurate redescription and better illustrations possible.

Redescription: Body length 5.0– 6.8 mm; length of forebody 2.3–2.9 mm; size subject to sexual dimorphism (males larger than females). Habitus as in Fig. 123 View Figs 115–129 . Coloration: body reddish, with the abdomen often somewhat darker; legs dark-yellowish; antennae reddish.

Head ( Fig. 124 View Figs 115–129 ) 1.03–1.05 times as long as broad; punctation rather sparse and moderately coarse; interstices on average distinctly broader than diameter of punctures, with distinct microreticulation. Eyes small, composed of approximately 10 ommatidia, approximately one-sixth as long as postocular region in dorsal view. Antenna 1.3–1.5 mm long.

Pronotum ( Fig. 124 View Figs 115–129 ) approximately 1.25 times as long as broad and 1.00–1.07 times as broad as head; punctation similar to that of head, but slightly denser; midline broadly impunctate; interstices without microsculpture.

Elytra ( Fig. 124 View Figs 115–129 ) approximately 0.6 times as long as pronotum; punctation fine and rather sparse; interstices without distinct microsculpture. Hind wings completely reduced. Protarsomeres I–IV with moderately pronounced sexual dimorphism; metatibiae and -femora unmodified.

Abdomen slightly broader than elytra; punctation distinct and rather dense, sparser on tergite VIII; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe; posterior margin of tergite VIII convex.

: protarsomeres I–IV distinctly dilated; sternite VII ( Fig. 125 View Figs 115–129 ) moderately transverse, with unmodified pubescence and with weakly concave posterior margin; sternite VIII ( Fig. 126 View Figs 115–129 ) approximately 1.07 times as long as broad, pubescence unmodified, posterior excision moderately deep and nearly U-shaped; aedeagus ( Figs 127–128 View Figs 115–129 ) approximately 1.15 mm long; ventral process extended into a long and slender spine, this spine weakly asymmetric and basally with ventral carina; dorsal plate short and membranous; internal sac without sclerotized structures.

: protarsomeres I-IV moderately dilated; sternite VIII ( Fig. 129 View Figs 115–129 ) approximately 1.25 times as long as broad and with convex posterior margin; tergite IX undivided in the middle, postero–lateral processes short and apically acute, barely extending beyond apex of tergite X; tergite X weakly convex in cross–section, of oval shape, and approximately 1.25 times as long as antero–median portion of tergite IX.

Distribution and natural history: Lathrobium aculeatum is known from three geographically close localities in the western Dhaulagiri range ( Map 2 View Map 2 ). The above spec-

imens, several of them teneral, were found close to the type locality, which is situated at approximately 28°51'N, 83°00'E. They were collected at an altitude of 3050 m and between 3400 and 3800 m.

NME

Sammlung des Naturkundemseum Erfurt

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Lathrobium

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