| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Palaeacmaea
Taxonomy
Palaeacmaea was named by Hall and Whitfield (1872).
It was assigned to Mollusca by Hall and Whitfield (1873); and to Metazoa by Webers and Yochelson (1999).
It was assigned to Mollusca by Hall and Whitfield (1873); and to Metazoa by Webers and Yochelson (1999).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1872 | Palaeacmaea Hall and Whitfield p. 242 |
| 1873 | Palaeacmaea Hall and Whitfield |
| 1999 | Palaeacmaea Webers and Yochelson p. 599 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Palaeacmaea Hall and Whitfield 1872
show all | hide all
†Palaeacmaea discoides Perner 1903
†Palaeacmaea horizontalis Perner 1903
†Palaeacmaea magnifica Twenhofel 1928
†Palaeacmaea postuma Böhm 1895
†Palaeacmaea typica Hall and Whitfield 1872
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. F. Webers and E. L. Yochelson 1999 | Patelliform to medusiform organisms having a subcentral apex, and circular to elliptical shape; ornamentation of several concentric undulations, formed by low ridges and low troughs of equal width. |