Temporal range: Late Triassic - Late Cretaceous, 228–65.5 Ma
Hypsocormus of the Pachycormidae
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Infraclass: Holostei
Order: Pachycormiformes


Pachycormiformes is an extinct order of ray-finned fish known from Mesozoic deposits from Eurasia and the Americas. They were characterized by having serrated pectoral fins, reduced pelvic fins and a bony rostrum. Their relations with other fish are unclear.

Protosphyraena perniciosa

Some sources place Ichthyodectidae herein too, but these seem to be somewhat more advanced Teleostei.

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