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A new genus of coprophagous beetle,    Evanesternum    gen. n.  (  Hydrophilidae  :   Sphaeridiinae  :   Megasternini  ), is described in order to accommodate   Cercyon  ( Acycreon )  pulsatus   d’Orchymont, 1937 from the Republic of South Africa and the Democratic Republic of Congo. A detailed description is provided along with habitus photographs, line drawings and SEM micrographs of relevant diagnostic characters. The new genus possesses the tribal synapomorphies of   Megasternini   but bears several unique morphological characters which are discussed in detail. The morphology of the remaining three species classified in the subgenus   Acycreon   d’Orchymont, 1942 (i.e.    C.   punctiger    Knisch, 1921,    C.   collarti    d’Orchymont, 1942 and    C.   apiciflavus    Hebauer, 2002), is illustrated in order to provide evidence that    Acycreon    is an assemblage of morphologically dissimilar and likely not related species. An identification key to the   Megasternini   genera and subgenera known from the Republic of South Africa is presented.

african invertebrates

A new genus of coprophagous water scavenger beetle from Africa (  Coleoptera  ,   Hydrophilidae  ,   Sphaeridiinae  ,   Megasternini  ) with a discussion on the   Cercyon   subgenus   Acycreon