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Taxonomy
Cyclorismina marwicki was named by Zinsmeister (1984) [DISTRIBUTION: Eocene; Seymour Island, Antarctica.]. Its type specimen is USNM 365541, a shell, and it is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Cyclorismina marwicki Zinsmeister p. 1522 figs. figs 10A-10C |
| 1992 | Cyclorismina marwicki Stilwell and Zinsmeister p. 82 |
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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.
†Cyclorismina marwicki Zinsmeister 1984
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Ypresian to the top of the Late/Upper Eocene or 56.00000 to 33.90000 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ypresian | Antarctica (Seymour Island) | Cyclorismina marwicki (63548 63549) | |
| Ypresian - Lutetian | Antarctica | Cyclorismina marwicki (72399 72400 72401 72402 72404 72405) | |
| Ypresian - Lutetian | Antarctica (Seymour Island) | Cyclorismina marwicki (63551) | |
| Bartonian | Antarctica (Seymour Island) | Cyclorismina marwicki (63552) | |
| Late/Upper Eocene | Antarctica | Cyclorismina marwicki (72394 72395 72397 72398) |