Clusiota Casey

Klimaszewski, Jan, Webster, Reginald P., Sikes, Derek, Bourdon, Caroline & Labrecque, Myriam, 2015, A review of Canadian and Alaskan species of the genera Clusiota Casey and AthetaThomson, subgenusMicrodota Mulsant & Rey (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 524, pp. 103-136 : 118-119

Taxon classification Animalia Coleoptera Staphylinidae

Genus Clusiota Casey

Clusiota Casey, 1910: 119; Moore and Legner 1975: 347.

Diagnosis.

The following combination of characters is distinctive for Clusiota : small and subparallel body (Figs 96, 88, 104), length 1.5−2.5 mm, antennomere I swollen (Figs 96, 88) except for Clusiota grandipenis (Fig. 104), and longer than II, V−X strongly transverse (Figs 96, 88, 104); labial palps with 3 articles; glossae narrow, deeply split forming V-shaped structure; maxillary palpus with 3 articles, last one narrowly elongate; pronotum transverse, about 1.2 times as wide as long, pubescence at midline directed apically in most specimens anteriorly and laterad elsewhere (Figs 96, 88, 104); pronotal hypomeron fully visible medially in lateral view; elytra with pubescence directed obliquely postero-laterad from midline of disc (Figs 96, 88, 104); abdomen slightly swollen posteriorly; male tergite VIII emarginate medially (Figs 89, 97, 105); median lobe of aedeagus with large bulbus and moderately narrow, and triangularly shaped apically tubus in dorsal view (Figs 91, 99, 107), crista apicalis of bulbus large (Figs 92, 100, 108); spermatheca L-shaped or S-shaped with club-shaped tubular capsule, and short sinuate stem (Figs 95, 103, 111).

Comments.

Species of this genus may be confused with Microdota species, from which they may be readily distinguished by the swollen first basal antennal articles (except for Clusiota grandipenis ), and shape of genitalia, with median lobe bearing large crista apicalis of bulbus. Casey (1910) believed this genus was related to the subgenus Datomicra of Atheta .

Key to Nearctic species of Clusiota