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Arnioceras semicostatum
Taxonomy
Ammonites semicostatum was named by Young and Bird (1828).
It was recombined as Arnioceras semicostatum by Geczy and Meister (2007).
It was recombined as Arnioceras semicostatum by Geczy and Meister (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1828 | Ammonites semicostatum Young and Bird |
| 2007 | Arnioceras semicostatum Geczy and Meister |
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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.
†Arnioceras semicostatum Young and Bird 1828
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Diagnosis
No diagnoses are available