Clusiota

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Taxonavigation

Ordo: Coleoptera
Familia: Staphylinidae

Name

Clusiota Casey – Wikispecies link – Pensoft Profile

• 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

Key to Nearctic species of Clusiota — J. Klimaszewski , R. Webster , D. Sikes , C. Bourdon , M. Labrecque

1.		Elytra longer than pronotum and at least 1.3 times broader than pronotum (Figs 88, 104)    2
−		Elytra at most as long as pronotum and about 1.1 times broader than pronotum (Fig. 96); median lobe of aedeagus with tubus straight medially and apical part broad in lateral view (Fig. 100), bulbus without distinct large sclerites in dorsal view (Fig. 99); male tergite VIII with shallowly emarginated apical margin (Fig. 97); spermatheca consisting of club-shaped and elongate capsule and sinuate, short and broad stem (Fig. 103)    Clusiota antennalis Klimaszewski & Godin
2.		Body reddish-brown (Fig. 88); median lobe of aedeagus with tubus sinuate medially and apical part narrow in lateral view (Fig. 92), bulbus with two strong elongate sclerites in dorsal view (Fig. 91); male tergite VIII with deeply emarginated apical margin (Fig. 89); spermatheca sinuate (Fig. 95)    Clusiota impressicollis (Bernhauer)
−		Body dark brown (Fig. 104), median lobe of aedeagus with tubus scarcely sinuate medially and apical part broad in lateral view (Fig. 108), bulbus with differently shaped structures (Fig. 107); spermatheca S-shaped (Fig. 111)    Clusiota grandipenis Klimaszewski & Webster, sp. n.

Taxon Treatment

• Klimaszewski, J; Webster, R; Sikes, D; Bourdon, C; Labrecque, M; 2015: A review of Canadian and Alaskan species of the genera Clusiota Casey and Atheta Thomson, subgenus Microdota Mulsant & Rey (Coleoptera, Staphylinidae, Aleocharinae) ZooKeys, (524): 103-136. doi

Images

Figures 88–95. Clusiota impressicollis (Bernhauer): 88 habitus in dorsal view 89 male tergite VIII 90 male sternite VIII 91 median lobe of aedeagus in dorsal view 92 median lobe of aedeagus in lateral view 93 female tergite VIII 94 female sternite VIII 95 spermatheca. Scale bar for habitus = 1 mm; remaining scale bars = 0.2 mm.  Figures 96–103. Clusiota antennalis (Klimaszewski & Langor): 96 habitus in dorsal view 97 male tergite VIII 98 male sternite VIII 99 median lobe of aedeagus in dorsal view 100 median lobe of aedeagus in lateral view 101 female tergite VIII 102 female sternite VIII 103 spermatheca. Scale bar for habitus = 1 mm; remaining scale bars = 0.2 mm.  Figures 104–111. Clusiota grandipenis Klimaszewski & Webster, sp. n.: 104 habitus in dorsal view 105 male tergite VIII 106 male sternite VIII 107 median lobe of aedeagus in dorsal view 108 median lobe of aedeagus in lateral view 109 female tergite VIII 110 female sternite VIII 111 spermatheca. Scale bar for habitus = 1 mm; remaining scale bars = 0.2 mm.