Miobdelus Sharp, 1889

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-

Miobdelus Sharp, 1889

TYPE SPECIES: Miobdelus brevipennis Sharp, 1889 .

COMMENTS: Members of this genus share the following character states: ( 1) head with macrosetae and some of other setae originating in punctures expanded into round, shallow, smooth depressions ( fig. 125 ); ( 2) mandibular prostheca lanceolate, with moderately long setae along entire medial margin ( fig. 143 ); and ( 3) posterior basal line on first three visible abdominal tergites gently bisinuate ( fig. 126 ).

Further character states include: palpifer with one long subapical and two shorter api­ cal setae; apical segments of maxillary and labial palpi moderately elongate, distinctly fusiform, with only that of labial palpus setose ( figs. 144, 145 ); postmandibular ridge absent; nuchal ridge present only dorsally, becoming obsolete well before base of infraorbital ridge laterally; dorsal disc of neck with umbilicate punctures without visible interspaces; pronotal epimeron small; long serial setae on mesosternum originating on edge of feeble, irregular, very broadly Ushaped ridge; mesosternal intercoxal process acute apically, margin finely beaded throughout ( fig. 60 ); acetabulum of middle coxae deeply depressed, nearly vertical behind projection; anterior metasternal projection with margins converging quite obtusely, apex very broadly rounded.

The genus at present contains only one species, M. brevipennis from Japan. However, the genus in fact includes many undescribed species in Taiwan and in mainland China, all of which live mostly at higher mountain elevations. A review of these species is under preparation by the senior author.

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. 142–145. 142. Dinothenarus fossor, mesosternum. 143. Miobdelus sp., left mandibular prostheca, ventral view. 144. Miobdelus sp., maxillary palpus. 145. Miobdelus sp., labial palpus.

Figs. 59–64. 59. Dinothenarus pubescens, series of long setae (some represented only by their sockets) on mesosternum. 60. Miobdelus sp., series of long setae on mesosternum. 61. Craspedomerus sp., series of long setae on mesosternum without transverse ridge. 62. Tasgius melanarius, mesocoxal acetabulum. 63. Ocypus weisei, mesocoxal acetabulum. 64. Staphylinus dimidiaticornis, mesocoxal cavities, not margined posteromedially.