A new specimen of the locally rare ammonoid Agoniatites has been recovered from the Middle Devonian Hamilton Group at Hungry Hollow, southwestern Ontario. Although immature, the specimen displays close affinity to Agoniatites vanuxemi Hall, with which it may be conspecific. An earlier and long-since discredited record of Agoniatites from Ontario is therefore reconfirmed. Despite continued uncertainty as to its precise stratigraphic provenance, the Ontario Agoniatites may prove important for regional correlation.

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