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Holdenia
Taxonomy
Holdenia was named by Cooper (1953). Its type is Holdenia typa.
It was assigned to Isocolidae by Whittington (1956) and Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Isocolidae by Whittington (1956) and Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
H. typa (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Holdenia Cooper |
| 1956 | Holdenia Whittington |
| 2002 | Holdenia Jell and Adrain p. 384 |
| 2002 | Holdenia 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.
Diagnosis
No diagnoses are available