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Taxonomy
Petrocrania exasperata was named by Cooper and Grant (1974). Its type specimen is USNM 152578a, a valve, and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Petrocrania exasperata Cooper and Grant pp. 249-250 figs. Pl 28, figs 35-38 |
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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.
†Petrocrania exasperata Cooper and Grant 1974
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Diagnosis
No diagnoses are available