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Petryoceras
Taxonomy
Petryoceras was named by Flower (1939) [Sepkoski's age data: D Fras Sepkoski's reference number: 299].
It was assigned to Spyroceratinae by Teichert et al. (1964); and to Orthocerida by Sepkoski (2002).
It was assigned to Spyroceratinae by Teichert et al. (1964); and to Orthocerida by Sepkoski (2002).
Synonymy list
Year | Name and author |
---|---|
1939 | Petryoceras Flower p. 117 |
1964 | Petryoceras Teichert et al. p. 250 |
2002 | Petryoceras Sepkoski |
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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. †Petryoceras Flower 1939
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Diagnosis
No diagnoses are available