Abemus Mulsant and Rey, 1876

SMETANA, ALEŠ & DAVIES, ANTHONY, 2000, Reclassification of the North Temperate Taxa Associated with Staphylinus Sensu Lato, Including Comments on Relevant Subtribes of Staphylinini (Coleoptera: Staphylinidae), American Museum Novitates 3287, pp. 1-1 : 1-

Abemus Mulsant and Rey, 1876

TYPE SPECIES: Staphylinus chloropterus Panzer, 1796 .

COMMENTS: Members of this genus share the following character states: ( 1) mandibles with similarly developed teeth, each with large tridentate middle tooth (individual dents not at same plane) and a small tooth basad of it in a deep, subrectangular indentation ( fig. 124 ); ( 2) mandibular prostheca appearing bilobed or even multilobed, with extensive basal group, and long distal group of ciliae originating on separate supporting arm ( fig. 12 ); ( 3) mentum with anterolateral portions (bearing two anterolateral setae) each obliquely deflected at an angle and therefore not at same level as disc of mentum, separated from it by obtuse carina ( fig. 123 ); and ( 4) postmandibular ridge almost reaching infraorbital puncture, running close to eye basally, infraorbital puncture situated three to four diameters from margin of eye.

Further character states include: maxillary and labial palpi both with last segment asetose, fusiform; mandibles each with dorsolateral ridge as in Ontholestes or Thoracostrongylus ; submentum with anterior margin not beaded; lateral end of nuchal ridge distinctly, but moderately, removed from nuchal constriction, directed toward level of transverse postgenal ridge; epimeron of prothorax well developed, projecting triangularly ( fig. 111 ); prosternum moderately prominent with broadly rounded slope anteriad, with prominent, arcuate carina continuing evenly onto furcasternum; mesosternum with long serial setae originating behind small elevations in more­or­less V­shaped pattern ( fig. 122 ), mesosternal intercoxal process rather acute apically, mesocoxal acetabulum moderately impressed behind; metasternum more or less horizontal, with little difference in convexity between projections and disc.

Figures

Figs. 123–128. 123. Abemus chloropterus, labium and mentum. 124. Abemus chloropterus, left mandible, dorsal view. 125. Miobdelus sp., posterolateral portion of head, showing pitlike depressions. 126. Miobdelus sp., first three visible abdominal tergites, showing bisinuate posterior basal line. 127. Ocypus picipennis picipennis, left mandible, ventral view. 128. Ocypus picipennis picipennis, right mandible, ventral view.

Figs. 11–16. 11. Platydracus stercorarius, right mandibular prostheca, ventral view. 12. Abemus chloropterus, left mandibular prostheca, ventral view. 13. Ocypus picipennis, left mandibular prostheca, ventral view. 14. Tasgius ater, left mandibular prostheca, ventral view. 15. Staphylinus dimidiaticornis, left mandibular prostheca, ventral view. 16. Tasgius melanarius, left mandibular prostheca, ventral view.

Figs. 111–116. 111. Dinothenarus pubescens, pronotum showing both marginal lines of pronotal hypomeron, and two lateral macrosetae, lateral view. 112. Staphylinus erythropterus, pronotum showing both marginal lines of pronotal hypomeron, and two lateral macrosetae, lateral view. 113. Ocypus ophthalmicus ophthalmicus, pronotum showing both marginal lines of pronotal hypomeron, and two lateral macrosetae, ventrolateral view. 114. Ocypus nitens semialatus, pronotum showing both marginal lines of pronotal hypomeron, and two lateral macrosetae, lateral view. 115. Physetops sp., dorsal face of neck, with dorsal portion of nuchal ridge missing. 116. Ontholestes cingulatus, dorsal face of neck, with nuchal ridge.

Figs. 117–122. 117. Ontholestes murinus, mesosternum with fully developed medial carina. 118. Thoracostrongylus sp., mesosternum with short medial carina at base. 119. Dinothenarus fossor, labium with emarginate ligula, ventral view. 120. Dinothenarus pubescens, labium and mentum. 121. Dinothenarus pubescens, right mandible and right maxilla, ventral view. 122. Abemus chloropterus, mesosternum, showing sockets of serial setae originating behind small elevations.