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n.1.(Paleon.) A genus of extinct oölitic fishes, having rounded teeth in several rows adapted for crushing.
References in periodicals archive ?
In September 2000, the author, digging in the streambed of the Ramanesson, collected the lower jaw of Gyrodus sp., an Osteichthyan fish of the Family Pycnodontidae.
trinitiensis bear a ring of radiating cuspules similar to that of the genus Gyrodus (Thurmond, 1974).