Mniusa Mulsant & Rey

Klimaszewski, Jan, Webster, Reginald P., Langor, David W., Bourdon, Caroline, Hammond, H. E. James, Pohl, Greg R. & Godin, Benoit, 2014, Review of Canadian species of the genera Gnathusa Fenyes, Mniusa Mulsant & Rey and Ocyusa Kraatz (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 412, pp. 9-40 : 20

Mniusa Mulsant & Rey

Mniusa Mulsant & Rey, 1875. Type species: Homalota incrassata Mulsant & Rey.

Diagnosis.

Body dark brown to black, compact, sides subparallel or body narrowly oval in outline (Figs 5a, 6a, 7a), length 2.0-3.2 mm; integument with distinct meshed microsculpture and moderately dense punctation and pubescence; head large with mandibles broad and long, left mandible with a small tooth (Figs 5h, 6h, 7h), and right one with a slightly larger tooth at the base of arcuate cutting edge of mandible, apices strongly narrowly elongate [more than in Ocyusa and less than in Gnathusa ] (Figs 5h, i, 6h, i, 7h, i); infraorbital carina strong and complete; ligula shallowly split apically (Figs 5l, 6l, 7l); labial palpus with three articles, second article minute, last one needle-shaped (Figs 5l, 6l, 7l), and lacinia and galea as illustrated (Figs 5k, 6k, 7k); labrum narrow and transverse, apical edge entire (Figs 5j, 6j, 7j); frontal suture of head absent; pronotal pubescence along midline directed anteriad or obliquely anteriad in about apical third and posteriad or obliquely posteriad medio-basally; anterior margin of mesosternum without longitudinal carina; mesosternal process triangular basally and then produced and extending from 1/3 to almost 2/3 length of mesosternal cavities, metasternal process triangular in shape and short; isthmus short to long; median lobe of aedeagus strongly produced ventrally, internal sac structures as illustrated (Figs 5b, 6b, 7b); spermatheca with spherical or tubular capsule narrowed posteriorly into L-shaped neck, invagination narrow; stem narrowly elongate (Figs 5e, 6e, 7e).

Key to Canadian species of Mniusa

New provincial and territorial records are indicated in boldface font.