Abstract

A remarkable core example of the Early Triassic ganoid fish Albertonia sp. has been discovered on a bedding plane in core in the Lower Triassic Montney Formation of Alberta. It matches very closely examples of the same species of fish recovered from outcrop in the time-equivalent Vega-Phroso Siltstone Member of the Sulphur Mountain Formation near Wapiti Lake in British Columbia. Albertonia is a member of the ganoid fish family Parasemionotidae, which is amongst the most advanced and abundant of Triassic subholostean families of fish. These fish were planktonic or deep-water in habitat and, together with other fish species identified from Wapiti Lake, may have indicated that bottom water conditions were anoxic.

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