An extinct family of primitive sharks from ancient seas, known for their distinctive branched-cusped teeth.
From cladodont (Greek 'klados' + 'odont' meaning 'branched tooth') plus the Linnaean family suffix '-idae,' following the taxonomic naming convention established in the 18th century.
The Cladodontidae family represents a crucial evolutionary branch point—their fossils show the transition from jawless fish to early jawed sharks, making them some of the most important specimens for understanding vertebrate evolution.
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