Abstract
Teeth of Cladodoides cf. wildungensis (Jaekel), fin spines of Ctenacanthus cf. angulatus Newberry et Worthen and Ctenacanthus sp. occur in the Lower Carboniferous Emyaksin Formation of the Vilyui River, Yakutia, Vilyui Syneclise, eastern part of the Siberian Platform. The assemblage includes widespread chondrichthyan taxa, along with endemic sarcopterygian fishes. The systematic position of Cladodoides is discussed. Their teeth possess some features characteristic of stethacanthids and ctenacanthids.Cladodoides is probably the basal taxon of cladodontomorph sharks.
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