Order Ctenacanthida | Phylum Chordata Subclass Elasmobranchii Rank Genus | |
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Similar Cobelodus, Sphenacanthus, Spathobatis, Sclerorhynchus, Ctenacanthus | ||
Tristychius is an extinct genus of shark from the Carboniferous period. Fossils have been found in Scotland.
Tristychius was a small shark, about 60 centimetres (2 ft) long. It had a well-developed upturned caudal fin, similar to that of many modern sharks. Physically it may have resembled a modern dogfish. Tristychius also had spikes attached to the bases of its dorsal fins, probably for protection against predators.
References
Tristychius Wikipedia(Text) CC BY-SA