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When do the fossil records of percopsiforms begin?
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paracanthopterygian
Oyster toadfish (Opsanus tau).
The fossil records of percopsiforms (trout-perches) begin in the Cretaceous period, with the genus Sphenocephalus identified from marine deposits in Europe. Other known fossil percopsiforms include genera from Cenozoic freshwater deposits in North America, such as Amphiplaga and Erismatopterus, which date to the middle Eocene Epoch.1