Lathrobium (Lathrobioma) othioides LeConte, 1880

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 (Lathrobioma) othioides LeConte, 1880

Lathrobium othioides LeConte, 1880: 175.

Lathrobioma othioides : Casey 1905: 101.

Lathrobium (Lathrobioma) inops Casey, 1885: 135; Bernhauer and Schubert 1912: 264 [in error].

Type material.

Lectotype, Lathrobium othioides LeConte, herein designated (MCZ): "Mas. / ♂ / [handwritten] L. othioides Lec. / [red] Type 6448 / Lectotype Lathrobium othioides LeConte Desg. Haberski & Caterino."

Other material.

Canada: Lake Superior (2, USNM) . USA: Iowa: ‘Ia.’ (1, USNM). Massachusetts: ‘Mass.’ (5, MCZ); Norfolk Co.: Brookline, 21 Mar 1899 (1, MCZ); same locality, 17 Apr 1899, C. A. Frost (1, CUAC); same data, except 09 Apr 1899 (1, MCZ); ‘Mass’ (1, USNM). New Jersey: ‘N.J.?’ (2, USNM) .

Diagnosis.

Males have distinctive aedeagi with the apex of the ventral process divided into two projecting horns, absent in all other Lathrobioma . Females can be difficult to distinguish from L. tenue , but their gonocoxites are generally more robust and convex in the basal half.

Description.

Body length 6 mm; body coloration dark red, appendages lighter red. Gular sutures arcuate; maxillary palpomere III> 0.4 × as wide as long; antennomeres V-VII as wide as long. Elytra as long as pronotum. Females with paraprocts undivided, apices shorter than basal portion; sternite VIII weakly oblong. Aedeagus with characteristic projections of ventral process (Fig. 31 ).

Distribution.

Canada: ON, NB, QC ( Bousquet et al. 2013). USA: IA, NJ, MA, RI.

Remarks.

Bernhauer and Schubert (1912) listed L. inops as a synonym of L. othioides , but after comparing the types, we determined this was incorrect. The aedeagus of L. othioides is quite distinctive and that of the L. inops lectotype did not match it. Instead, it was indistinguishable from that of L. scolopaceum , with which we synonymize L. inops below.

Figures

Figures 29 - 34. Lathrobium terminalia A female terminalia B male sternite VIII C aedeagus in ventral view D Aedeagus in lateral view. 29 L. divisum 30 L. nanulum 31 L. othioides 32 L. scolopaceum 33 L. tenue 34 L. amplipenne. Scale bars: 1 mm.