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Ptychacanthus
Taxonomy
Ptychacanthus was named by Agassiz (1836).
It was assigned to Heterodontidae by Jordan (1963); and to Myliobatiformes by Cappetta (1987).
It was assigned to Heterodontidae by Jordan (1963); and to Myliobatiformes by Cappetta (1987).
Species
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Ptychacanthus Agassiz 1836
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†Ptychacanthus faujasii Agassiz 1837
†Ptychacanthus sublaevis Agassiz 1836
Diagnosis
No diagnoses are available