Lathrobium guransicum, Assing, 2018

Assing, Volker, 2018, Five new species of Lathrobium from Nepal and China (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology (Beitr. Entomol.) 68 (2), pp. 361-369 : 364

publication ID

https://doi.org/ 10.21248/contrib.entomol.68.2.361-369

publication LSID

lsid:zoobank.org:pub:219B62F1-B798-4121-B4A2-92A7BCD2B952

persistent identifier

https://treatment.plazi.org/id/03EB87FF-FFF3-5D22-FF0F-ACFFD123F7EC

treatment provided by

Carolina

scientific name

Lathrobium guransicum
status

sp. nov.

Lathrobium guransicum View in CoL spec. nov.

urn:lsid:zoobank.org:act:B1554BAD-7DAF-4C64-938B-2CB07BC00902 ( Figs 11–16 View Figs 1–14 View Figs 15–20 ) Type material: Holotype : “NEP: Mahakali / Darchula, vic. Rapla, Shipu Lekh , 4320 m, N29°54'17", E80°47'57", 24.VI.2017, leg. A. Weigel, rocky slopes/snow fields, #17-11a / Holotypus  Lathrobium guransicum sp. n., det. V. Assing 2018” (NME). 2 : same data as holotype (NME, cAss). Etymology: The specific epithet is an adjective derived from the name of the mountain range (Gurans Himal) where the type locality is situated. Description: Body length 7.0– 7.5 mm; length of fore- body 3.2–3.4 mm; habitus as in Fig. 11 View Figs 1–14 . Coloration: body reddish; legs yellowish-red; antennae reddish. Head ( Fig. 12 View Figs 1–14 ) approximately as broad as long; punctation moderately fine and rather dense; interstices with very shallow microreticulation. Eyes ( Fig. 13 View Figs 1–14 ) not projecting from lateral contours of head, very small, and composed of approximately 10 ommatidia. GoogleMaps

Pronotum ( Fig. 12 View Figs 1–14 ) approximately 1.25 times as long as broad and approximately 0.95 times as broad as head; punctation slightly finer and denser than that of head; interstices without microsculpture.

Elytra ( Fig. 12 View Figs 1–14 ) short, approximately 0.6 times as long as pronotum; humeral angles weakly marked; punc- tation shallow and ill-defined; interstices without microsculpture. Hind wings completely reduced. Metati- bia somewhat compressed.

Abdomen broader than elytra; punctation moderately fine and dense; interstices with fine, shallow, and trans- verse microsculpture; posterior margin of tergite VII without palisade fringe; posterior margin of tergite VIII convex.

: protarsomeres I–IV strongly dilated; sternite VII ( Fig. 15 View Figs 15–20 ) very strongly transverse, with dense and strongly modified setae in postero-median portion and with moderately dense and weakly modified setae along middle, posterior margin broadly and distinctly concave; sternite VIII ( Fig. 16 View Figs 15–20 ) transverse, with extensive impres- sion in postero-median portion, this impression with numerous dense and strongly modified setae, posterior excision very broad, shallow, and slightly asymmetric; aedeagus ( Fig. 14 View Figs 1–14 ) 1.6 mm long; ventral process straight and apically hooked in lateral view, and symmetric in ventral view; dorsal plate with long, strongly sclerotized, and apically acute apical portion, basal portion completely reduced; internal sac with a massive and strongly scle- rotized apical spine and with a weakly sclerotized subapical spine.

: unknown.

Comparative notes: Primarily based on the morphology of the aedeagus (dorsal plate with strongly sclerotized apical portion and reduced basal portion; internal sac with heavily sclerotized apical spine), L. guransicum is tentatively attributed to the L. emodense group (see ASSING 2012), which previously included seven species from Central Nepal: L. emodense COIFFAIT, 1975 (SW-Annapurna), L. curvum ASSING, 2012 (Dhaulagiri) , L. spinosissimum ASSING, 2012 (Annapurna: Lamjung Himal), L. annapurnense ASSING, 2012 (Annapurna: Lamjung Himal), L. rude ASSING, 2014 (SE-Annapurna), L. kiruense ASSING, 2015 (SE-Annapurna), and L. unguiferum ASSING, 2016 (S-Dhaulagiri). The new species is distinguished from all of them by smaller eyes (other species: eyes composed of at least approximately 20 ommatidia), by completely different shapes and chaetotaxy of the male sternites VII and VIII, as well as by the morphology of the aedeagus. For illustrations of other species of the L. emodense group see ASSING (2012, 2014, 2015, 2016).

Distribution: The type locality and the circumstances of collection are identical to those of L. adsurgens .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Lathrobium

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