Lathrobium flexaculeatum, Assing, 2014

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 : 16-18

publication ID

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

persistent identifier

https://treatment.plazi.org/id/03FF87F6-FFAA-FFA7-FCD2-8BA98C02FC78

treatment provided by

Carolina

scientific name

Lathrobium flexaculeatum
status

sp. nov.

Lathrobium flexaculeatum View in CoL sp. n.

( Figs 79–88 View Figs 79–96 , Map 2 View Map 2 )

Type material: Holotype : “ NEPAL SW Dhaulagiri, E Dhorpatan 3000 m, 22.IX.12 lg. J. Schmidt, 28°30'08"N, 83°07'45"E / Holotypus  Lathrobium flexaculeatum sp. n., det. V. Assing 2013” ( NME). GoogleMaps

Paratypes: 1 , 1 sex? [posterior portion of abdomen missing]: same data as holotype ( NME, cAss) GoogleMaps .

Etymology: The specific epithet is an adjective composed of the Latin adjectives flexus (bent) and aculeatus (with a sting). It alludes to the curved sting-shaped apex of the ventral process of the aedeagus.

Description: Body length 5.4–5.6 mm; length of forebody 2.6–2.8 mm. Habitus as in Fig. 79 View Figs 79–96 . Coloration: forebody reddish to dark-brown; abdomen dark-brown to blackish-brown; legs and antennae reddish.

Head ( Fig. 80 View Figs 79–96 ) weakly oblong, approximately 1.04 times as long as broad; punctation moderately dense and moderately coarse, sparser in median dorsal portion; interstices with distinct microreticulation. Eyes small, composed of approximately 10 ommatidia, one-sixth to one-fifth as long as postocular region in dorsal view. Antenna 1.3–1.4 mm long.

Pronotum ( Fig. 80 View Figs 79–96 ) approximately 1.25 times as long as broad and about as broad as head; punctation similar to that of head; midline broadly impunctate; interstices without microsculpture.

Elytra ( Fig. 80 View Figs 79–96 ) approximately 0.6 times as long as pronotum; punctation fine and sparse; interstices without distinct microsculpture. Hind wings completely reduced. Protarsomeres I–IV with weakly pronounced sexual dimorphism; metatibia compressed in apical two-thirds in both sexes; metafemora sexually dimorphic.

Abdomen slightly broader than elytra; punctation distinct and moderately dense; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe.

: protarsomeres I–IV strongly dilated; metafemur posteriorly with a long and oblique (more pronounced basally than apically) carina in the middle ( Fig. 81 View Figs 79–96 ); sternite VII ( Fig. 82 View Figs 79–96 ) strongly transverse, in posterior portion with extensive cluster of numerous long and stout black setae, posterior margin with broad and not very deep posterior excision, margin of this excision with a comb of approximately 35 long palisade setae; sternite VIII ( Fig. 83 View Figs 79–96 ) approximately 1.15 times as broad as long, in antero-median portion extensively without pubescence, posterior excision moderately deep, moderately broad, and anteriorly rounded, lateral margins of this excision with a row of dense short setae; aedeagus ( Figs 84–85 View Figs 79–96 ) approximately 0.95 mm long and somewhat asymmetric; ventral process basally broad and apically extending into a sinuate spine-shaped process in ventral view; dorsal plate broad, short, and apically weakly convex ( Fig. 86 View Figs 79–96 ); internal sac without appreciable structures.

: protarsomeres I–IV moderately dilated; sternite VIII ( Fig. 87 View Figs 79–96 ) 1.13 times as long as broad and with strongly convex posterior margin; tergite IX ( Fig. 88 View Figs 79–96 ) undivided in the middle, postero-lateral processes short, only slightly extending beyond apex of tergite X; tergite X ( Fig. 88 View Figs 79–96 ) flat, of oval shape, and approximately 1.2 times as long as antero-median portion of tergite IX.

Comparative notes: Among the species of the L. pectinatum group, L. flexaculeatum is characterized by the compressed metatibiae (in male and females), the modifications of the male metafemora, the shapes and chaetotaxy of the male sternites VII and VIII, and by the morphology of the aedeagus.

Distribution and natural history: The type locality is situated in the southwestern Dhaulagiri range, Central Nepal ( Map 2 View Map 2 ), at an altitude of 3000 m.

V

Royal British Columbia Museum - Herbarium

NME

Sammlung des Naturkundemseum Erfurt

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Lathrobium

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