Based on the original type material, the nymphal stage of the mayfly Takobiamaxillare is redescribed; in parallel, a lectotype is designated. Takobiamaxillare is the type species of the genus Takobia, and an accurate and complete knowledge of its morphology is crucial to the delimitation of this problematic genus and clarification of its phylogenetic affinities. Ambiguous characters, previously reported for this species in the literature are clarified. Furthermore, two new species in the same genus are described, namely Takobiasinusopalpata sp. nov. and Takobiashughnonica sp. nov. based on the morphology of nymphs from Central Asia, supplemented with COI sequences. Implications for the systematics of Takobia and related taxa are discussed and the need for an extensive phylogenetic study of this group is stressed.

A N Severtsov Institute of Ecology and Evolution of RAS 119071 Moscow Russia A N Severtsov Institute of Ecology and Evolution of RAS Moscow Russia

Biology Centre of the Czech Academy of Sciences Institute of Entomology Branišovská 31 37005 České Budějovice Czech Republic Biology Centre of the Czech Academy of Sciences Institute of Entomology České Budějovice Czech Republic

Musée cantonal de zoologie Palais de Rumine Place de la Riponne 6 1014 Lausanne Switzerland Musée cantonal de zoologie Lausanne Switzerland

The Steinhardt Museum of Natural History Tel Aviv University Tel Aviv 6997801 Israel Tel Aviv University Tel Aviv Israel

University of Lausanne Department of Ecology and Evolution 1015 Lausanne Switzerland University of Lausanne Lausanne Switzerland

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