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Tetragramma
Taxonomy
Tetragramma was named by Agassiz (1840) [Sepkoski's age data: J Call K Turo-u Sepkoski's reference number: 577,956]. Its type is Cidarites variolare.
It was assigned to Hemicidaroida by Sepkoski (2002); and to Pseudodiadematidae by Fell and Pawson (1966), Smith (1991) and Berndt (2003).
It was assigned to Hemicidaroida by Sepkoski (2002); and to Pseudodiadematidae by Fell and Pawson (1966), Smith (1991) and Berndt (2003).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1840 | Tetragramma Agassiz |
| 1966 | Tetragramma Fell and Pawson p. U390 |
| 1991 | Tetragramma Smith p. 22 |
| 2002 | Tetragramma Sepkoski |
| 2003 | Tetragramma Berndt p. 80 |
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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.
Diagnosis
No diagnoses are available