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Orthoceras annulata
Taxonomy
Orthoceras annulata was named by Sowerby (1818). It is not extant.
It was recombined as Dawsonoceras annulatum by Hyatt (1884), Kröger and Isakar (2006), Kröger and Isakar (2006), Kröger (2013).
It was recombined as Dawsonoceras annulatum by Hyatt (1884), Kröger and Isakar (2006), Kröger and Isakar (2006), Kröger (2013).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1818 | Orthoceras annulata Sowerby |
| 1884 | Dawsonoceras annulatum Hyatt p. 277 |
| 2006 | Dawsonoceras annulatum Kröger and Isakar |
| 2013 | Dawsonoceras annulatum Kröger |
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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.
†Orthoceras annulata Sowerby 1818
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Collections
No collection or age range data are available