Lathrobium (Lathrobium) spissicorne Casey, 1905

Haberski, Adam & Caterino, Michael S., 2024, A review of Nearctic Lathrobium (Coleoptera, Staphylinidae), with revision and descriptions of new flightless species from the mountains of the southeastern U. S., ZooKeys 1198, pp. 193-277 : 193

Lathrobium (Lathrobium) spissicorne Casey, 1905

Lathrobium spissicorne Casey, 1905: 83.

Type material.

Lectotype Lathrobium spissicorne Casey, herein designated (USNM): "Mass / CASEY bequest 1925 / [red] TYPE USNM 38111 / [handwritten] Lathrobium spissicorne / Lectotype Lathrobium spissicorne Casey Desg. Haberski & Caterino."

Other material.

USA: Massachusetts: ‘Mass’ (1, USNM); ‘Mass’ (1, MCZ) . Michigan: Wayne Co.: Detroit, Oct (1, USNM) .

Diagnosis.

Lathrobium spissicorne can be distinguished from all other Nearctic Lathrobium by unique primary and secondary sexual characters. The male sternite VIII has a scalloped emargination, and the dorsal plate of the aedeagus bends over the top of the ventral process. In females, the inner margin of the gonocoxites is broad and distinctively arched.

Description.

Body length 7 mm; body coloration dark red throughout. Gular sutures parallel, widely separate; antennomeres V-VII as wide as long. Elytra longer than pronotum. Female sternite VIII weakly oblong. Genitalia as in Fig. 51 .

Distribution.

Canada: NB, ON, QC, PE ( Bousquet et al. 2013). USA: MA, MI.

Figures

Figures 50 - 53. Lathrobium terminalia A female terminalia B male sternite VIII C aedeagus in ventral view D aedeagus in lateral view. 50 L. sparsellum 51 L. spissicorne 52 L. washingtoni 53 L. debile. Scale bars: 1 mm.