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Ptychognathus
Taxonomy
Dicynodon (Ptychognathus) was named by Owen (1860).
It was reranked as Ptychognathus by Owen (1860) and Owen (1861); it was replaced with Ptychosiagum by Lydekker (1890).
It was assigned to Dicynodon by Owen (1860); and to Dicynodontia by Owen (1860) and Owen (1861).
It was reranked as Ptychognathus by Owen (1860) and Owen (1861); it was replaced with Ptychosiagum by Lydekker (1890).
It was assigned to Dicynodon by Owen (1860); and to Dicynodontia by Owen (1860) and Owen (1861).
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. †Ptychognathus Owen 1860
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Diagnosis
No diagnoses are available