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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-07-09 and was most recently seen on 2026-07-09.
Cardipeltis is an extinct genus of heterostracan jawless-fish from the early Devonian of Utah and Wyoming. Material of the fish has come from the Beartooth Butte Formation and Water Canyon Formation. Compared to other members of Heterostraci, Cardipeltis was strange. While having a dorsal shield similar to what is seen in more well known groups such as pteraspids, the ventral shield is made up of a large number of small polygonal plates more similar to what is seen in "Tessellate heterostracans". Along with this, unlike other members of the subclass, the brachial openings of the fish were located on the dorsal surface rather than on the sides. Due to this strange anatomy, the exact placement of Cardipeltis within Heterostraci has been disputed. Depending on the author, it was suggested to be closely related to Pteraspidiformes, Psammosteidae, Cyathaspididae, or "Tessellate heterostracans". More recent studies suggest that Cardipeltis is closely related to "Tessellate heterostracans". The environments that the fish is presented in represent brackish to freshwater environments, mainly bays and deltas.
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