Abstract
In this paper, the Palearctic genus DimorphaphoruraBagnall, 1949 (Collembola: Onychiuridae), is revised. The diagnosis of the genus is defined within the tribe Oligaphorurini based on the development of the furcal area, shape of furcal rudiment, and furcal chaetotaxy. Six new species are described: D. olenaesp. n. from Ukraine, D. inyasp. n . , D. pseudoinyasp. n., D. sibiricasp. n., D. caucasicasp. n. , and D. sophyaesp. n. from Russia. The type species of the genus, D. differensBagnall, 1949 is redescribed, and the lectotype and paralectotypes are designated. All previously known species are redescribed or with additional characters complemented: D. alnus ( Fjellberg, 1987 ) comb. n. , D. chatyrdagi ( Kaprus’, Weiner & Pomorski, 2002 ) comb. n. , D. daii ( Pomorski, Skarżyński & Kaprus’, 1998 ) comb. n. , Dimorphaphorura eremia ( Kaprus’,Weiner & Pomorski, 2002 ) comb. n. , D. hackeri ( Christian, 1986 ) comb. n. , D. irinae ( Thibaud & Taraschuk, 1997 ) comb. n. , D. melittae ( Christian, 1993 ) comb. n. , D. pseudoraxensis ( Nosek & Christian, 1983 ) comb. n. , D. raxensis ( Gisin, 1961 ) comb. n. , D. steposa ( Kaprus’, Weiner & Pomorski, 2002 ). An identification key to all Dimorphaphorura species is provided.
Highlights
Bagnall (1949) established the genus Dimorphaphorura with the type species D. differens for the Tirolian specimens determined and briefly described by Stach (1947) as Onychiurus quadrituberculatus (Bőrner, 1901)
In 1996 did Pomorski re-established Oligaphorura and Micraphorura to the generic level, and Weiner (1996) provided new diagnoses for these two genera and Dimorphaphorura based on new characters, but she wrongly interpreted the chaetotaxy of the manubrial rows, as she joined chaetae on rows mm and ma (1+1), which she considered as dental chaetae
Eleven species belonging to the genus Dimorphaphorura are currently known from the Palearctic region, distributed across mountainous regions (Tirol, Crimea Mts.), caves (Lower Austria, Crimea), and steppe and forest-steppe (Ukraine)
Summary
Bagnall (1949) established the genus Dimorphaphorura with the type species D. differens for the Tirolian specimens determined and briefly described by Stach (1947) as Onychiurus quadrituberculatus (Bőrner, 1901).
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