Liogluta trapezicollis Lohse, 1990

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Sikes, Derek, Bourdon, Caroline, Godin, Benoit & Ernst, Crystal, 2016, A review of Canadian and Alaskan species of the genus Liogluta Thomson, and descriptions of three new species (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 573, pp. 217-256: 223-226

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Liogluta trapezicollis Lohse, 1990


Liogluta trapezicollis Lohse, 1990  Figs 8-15

Liogluta (Anepsiota) trapezicollis  Lohse, in Lohse et al. 1990: 165. Holotype (male): Canada, Yukon Territory, Dempster Hwy., Mi. 60, 3500 ft., 19.VII.1978, J.M. Campbell and A. Smetana ( CNC). Not examined.

New locality data.

Summarized for 146 specimens captured at 45 collection events from 6 major regions of Southeast Alaska, see for the full data. USA: Alaska: Baranof Island (11 specimens, UAM), Chichagof Island (84 specimens, UAM), Dall Island (2 specimens, UAM), Haines, Flower Mountain (3 specimens, UAM), Hawthorne Peak (45 specimens, UAM), South Chilkat Peninsula (1 specimen, UAM). Excel file with locality data is available from LFC.


This species may be distinguished by the following combination of characters: body subparallel, slender, dark brown to black with pronotum brown and paler than head, elytra yellowish or reddish-brown (Fig. 8); length 3.8-4.4 mm; integument of forebody with meshed microsculpture moderately pronounced, surface moderately glossy; head about one-quarter narrower than maximum width of pronotum; pronotum transverse, narrower at base and widest at middle (width of pronotum variable, some specimens have pronotum markedly narrower than base of elytra and some have pronotum nearly as wide as base of elytra); elytra at suture slightly shorter than pronotum; basal three articles of metatarsus elongate, subequal in length and each slightly longer than fourth article; male tergite VIII with apical margin truncate, bordered by two short lateral teeth, variably sculptured and ranging from smooth to crenulate, or denticulate along margin (Fig. 11); genital structures as illustrated (Figs 9-15).

Natural history.

The holotype was collected in July ( Lohse et al. 1990). The Alaskan specimens were collected in July only from alpine zones between 453 and 1071 m elevation, none were collected in lowland forests. Habitats include alpine flood meadows, under rocks, herbaceous heath with Luetkea  , Cassiopes  , and Lupinus  , low rocky tundra with Dryas  , meadow heath with Phyllodoce  , Senecio  , and Luetkea  , shrubby krummholz with Elliottia  and Tsuga  , wet meadows with Carex  , Petasites  , Senecio  and Ranunculus  .


Canada: BC, YT ( Klimaszewski et al. 2012). USA: AK ( Lohse et al. 1990).


We were not able to compare types of Liogluta trapezicollis  Lohse with the specimens we examined, and our determinations are based on the published description by Lohse in Lohse et al. (1990). The types of Liogluta trapezicollis  housed in the Canadian National Collection of Insects were borrowed several years ago by V. Gusarov (Oslo, Norway) and our persistent efforts to have these specimens returned to Canada have failed.

Five specimens in UAM were successfully DNA barcoded ( UAM GUID, BOLD Process ID): UAM:Ento:145576, UAMIC2696-15; UAM:Ento:145623, UAMIC2740-15; UAM:Ento:152467, UAMIC2750-15; UAM:Ento:232527, UAMIC2677-15; UAM:Ento:232696, UAMIC2753-15. The DNA sequences for these specimens are all very similar (maximum distance of 0.32%, nearest neighbour of 3.13%) and fall within the same BIN (Barcode Index Number) ( Ratnasingham and Hebert 2013), BOLD:ACU9772, which is not shared by any other species.