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Circulus occidentalis
Taxonomy
Circulus occidentalis was named by Pilsbry and Olsson (1941). It is not a trace fossil. Its type locality is Zone J - Canoa Formation, which is in a Piacenzian/Gelasian coastal sandstone/claystone in the Canoa Formation of Ecuador.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1941 | Circulus occidentalis Pilsbry and Olsson |
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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.
†Circulus occidentalis Pilsbry and Olsson 1941
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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, Hendy et al. 2009 | |||||
Age range: base of the Early/Lower Pleistocene to the top of the Gelasian or 2.58000 to 1.80000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Piacenzian - Gelasian | Ecuador (Manabi) | Circulus occidentalis (type locality: 51878) | |
| Early/Lower Pleistocene | Ecuador (Manabi) | Circulus occidentalis (48664 48665) | |
| Early/Lower Pleistocene | Costa Rica | Circulus occidentalis (66777) |