| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Acirsa (Acirsa)
Taxonomy
Acirsa (Acirsa) was named by Mörch (1857). It is extant.
It was assigned to Acirsa by Mörch (1857), Durham (1937) and Rosenberg et al. (2006).
It was assigned to Acirsa by Mörch (1857), Durham (1937) and Rosenberg et al. (2006).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1857 | Acirsa (Acirsa) Mörch |
| 1937 | Acirsa (Acirsa) Durham p. 510 |
| 2006 | Acirsa (Acirsa) Rosenberg et al. |
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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
| Reference | Diagnosis | |
|---|---|---|
| J. W. Durham 1937 | Shell heavy, moderately slender; fine spiral striae, axial ribs nearly obsolete; basal disk indistinct but with a distinct peripheral groove; umbilicus closed, outer lip sharpened. Boreal or deep water. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Beu et al. 1990 | |||||
Age range: Late/Upper Pleistocene or 0.12900 to 0.01170 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pleistocene | USA (Alaska) | Acirsa borealis (37632) | |
| Late/Upper Pleistocene | Greenland (Disko Island) | Scallaria borealis (227045) |