Revision of the Afrotropical-Oriental Rhantus rugulosus-clade (Coleoptera: Dytiscidae)

Author: Balke Michael  

Publisher: Brill

ISSN: 1876-312X

Source: Insect Systematics & Evolution, Vol.26, Iss.2, 1995-01, pp. : 229-239

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Abstract

Rhantus rugulosus Régimbart, 1899, R. rohani Peschet, 1924, R. colymbitoides Gschwendtner, 1932 and R. tigris sp. n. form a monophyletic group, here referred to as the R. rugulosus-clade. The ground pattern of this group is discussed, and the species are briefly described. R. rugulosus + R. tigris is the sister group of R. rohani + R. colymbitoides. The former is Oriental, the latter Afrotropical. The extant distribution range of the R. rugulosus-clade, i.e., a disjunct range with species occurring either in the Oriental or the Afrotropical region, is explained by Miocene dispersal and late Cenozoic vicariance events.