Lathrobium (Lathrolepta) debile 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 (Lathrolepta) debile LeConte, 1880

Lathrobium debile LeConte, 1880: 176.

Lathrolepta debilis Casey, 1905: 104.

Lathrobium (Lathrolepta) debilie : Bernhauer and Schubert 1912: 258.

Type material.

Lectotype, Lathrobium debile LeConte, herein designated (MCZ): "Mic. / [handwritten] 463 / [handwritten] L. debile Lec. / Lectotype Lathrobium debile LeConte Desg. Haberski & Caterino."

Other material.

Canada: Ontario: 'Ont. Can.' (1, USN) . USA: Indiana: ‘In.’ (1, USNM) . Massachusetts: ‘Mass,’ Jul 1903, J. Blanchard (1, MCZ); ‘Mass’ (5, USNM) . Michigan: ‘Mic.’ (1, USNM) . New Hampshire: Grafton Co.: Downes Brook, Potash Mountain , 05 Jun 2021, A. Haberski (1, CUAC); Belknap Co. : Lower Gilmanton , 23 Apr 1982, D. S. Chandler (6, UNHC); Chesire Co. : Rhododendron State Park , 22 Apr 1982, D. S. Chandler, sifted rotten spruce & fir logs (4, UNHC); Hillsborough Co. : Miller State Park , 22 Apr 1982, D. S. Chandler, oak litter (2, UNHC); Strafford Co. : Spruce Hole Conservation Area , 3 mi SW Durham, 02 Jul 1987, litter near bog (2, UNHC) . New York: 'N. Y.' (1, USNM).

Diagnosis.

Lathrobium debile differs from all other described species of Nearctic Lathrobium in its small size and diverging gular sutures. However, it resembles members of the Lathrobium sibiricum group, which may have undescribed diversity in Alaska and Northwest Territories. Species in the Lathrobium sibiricum group lack a dorsal plate on the aedeagus and have a sclerotized ring-like structure on the membranous endophallus. Lathrobium debile has a dorsal plate and lacks the ring-like structure.

Description.

Extremely small species, body length 3.5-4 mm; coloration reddish, appendages lighter. Gular sutures divergent (Fig. 1D ). Antennae short, antennomeres as long as wide. Female sternite VIII oblong. Genitalia as in Fig. 53 .

Distribution.

Canada: ON, NB, QC ( Bousquet et al. 2013). USA: IA, IN, MA, MI, NH, NY ( Newton 2022).

Figures

Figure 1. Lathrobium gular sutures A L. simile B L. amplipenne C L. islae D L. debile.

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.