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Didymoceras cheyenense
Taxonomy
Ancyloceras cheyenensis was named by Meek and Hayden (1856) [DISTRIBUTION: Campanian; North America.]. It is not a trace fossil.
It was recombined as Turrilites cheyenensis by Meek and Hayden (1856); it was recombined as Helicoceras cheyenense by Meek and Hayden (1860); it was recombined as Didymoceras cheyennense by Zaborski (1985) and Kennedy and Cobban (1994); it was recombined as Didymoceras cheyenense by Kennedy et al. (2000).
It was recombined as Turrilites cheyenensis by Meek and Hayden (1856); it was recombined as Helicoceras cheyenense by Meek and Hayden (1860); it was recombined as Didymoceras cheyennense by Zaborski (1985) and Kennedy and Cobban (1994); it was recombined as Didymoceras cheyenense by Kennedy et al. (2000).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1856 | Turrilites cheyenensis Meek and Hayden p. 280 |
| 1860 | Helicoceras cheyenense Meek and Hayden p. 185 |
| 1985 | Didymoceras cheyennense Zaborski p. 17 fig. 15a,b |
| 1994 | Didymoceras cheyennense Kennedy and Cobban p. 1290 |
| 2000 | Didymoceras cheyenense Kennedy et al. p. 7 |
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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.
†Didymoceras cheyenense Meek and Hayden 1856
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Diagnosis
No diagnoses are available