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Dinorthis (Retrorsirostra)
Taxonomy
Dinorthis (Retrorsirostra) was named by Schuchert and Cooper (1932) [Sepkoski's age data: O Cara-u O Ashg-m Sepkoski's reference number: 1].
It was reranked as Retrorsirostra by Howe (1988), Williams et al. (2000) and Sepkoski (2002).
It was assigned to Dinorthis by Schuchert and Cooper (1932); to Plaesiomyidae by Howe (1988); to Plaesiomyinae by Williams et al. (2000); and to Orthida by Sepkoski (2002).
It was reranked as Retrorsirostra by Howe (1988), Williams et al. (2000) and Sepkoski (2002).
It was assigned to Dinorthis by Schuchert and Cooper (1932); to Plaesiomyidae by Howe (1988); to Plaesiomyinae by Williams et al. (2000); and to Orthida by Sepkoski (2002).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Dinorthis (Retrorsirostra) Schuchert and Cooper |
| 1988 | Retrorsirostra Howe p. 213 |
| 2000 | Retrorsirostra Williams et al. p. 749 |
| 2002 | Retrorsirostra 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.
Subg. †Dinorthis (Retrorsirostra) Schuchert and Cooper 1932
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Diagnosis
No diagnoses are available