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Physonemus gemmatus
Taxonomy
Drepanacanthus gemmatus was named by Newberry and Worthen (1866). It is considered to be a form taxon.
It was recombined as Xystracanthus gemmatus by Hay (1902); it was recombined as Physonemus gemmatus by Eastman (1903).
It was recombined as Xystracanthus gemmatus by Hay (1902); it was recombined as Physonemus gemmatus by Eastman (1903).
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.
†Physonemus gemmatus Newberry and Worthen 1866
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Diagnosis
No diagnoses are available