The smallest Cyrtoscydmini of Australia: revision of Microscydmus Saulcy & Croissandeau and Penicillidmus gen. n. (Coleoptera, Staphylinidae, Scydmaeninae)

摘要

The Australian members of Microscydmus are revised, and a new subgenus Scydmomicrus subgen. n. is established to accommodate seven species: M. (Sc.) australtensis Franz (type species of Scydmomicrus), M. (Sc.) nasicornis Franz. M. (Sc.) capitiseboracisp. n.. M. (Sc.) cpieenslandicus sp. n.. M. (Sc.) styxiamis sp. n., M. (Sc.) edithensis sp. n.. and M. (Sc.) tooloomensis sp. n. A new Microscydmus-Wke genus, Penicillidmus gen. n., is described to include Penicillidmus massey-ensis sp. n. (type speciesof Penicillidmus) and P. unicolor sp. n. Species of Microscydmus and Penicillidmus are distributed along the eastern coast of Australia, from the northern Cape York to northeastern New South Wales, and females of an undescribed Microscydmus are recordedfrom southern New South Wales. The revised taxa comprise the smallest Australian Cyrtoscydmini. with body lengths of only 0.50-0.65 mm (Microscydmus) and 0.83-0.86 mm (Penicillidmus). For comparative purposes, morphological details of the type species of Microscydmus, M. nanus, are described, and structures of the new subgenus and new genus are illustrated. Variations of character states within Microscydmus found among Australian species are discussed.