Describing or relating to fish that have ganoid-type coating on their head structures; characteristic of the ganocephala group.
From ganocephala plus -ous (suffix meaning full of or characterized by). The adjective form allows scientists to describe features of fish without naming the full group.
When paleontologists call a fish 'ganocephalous,' they're essentially saying it's wearing a coat of enamel armor on its head—it's a fancy way to describe one of evolution's most brilliant defensive designs.
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