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Calycoceras (Newboldiceras) annulatum
Taxonomy
Calycoceras annulatum was named by Collignon (1964).
It was recombined as Calycoceras (Newboldiceras) annulatum by Zaborski (1985) and Matsumoto and Skwarko (1991).
It was recombined as Calycoceras (Newboldiceras) annulatum by Zaborski (1985) and Matsumoto and Skwarko (1991).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1964 | Calycoceras annulatum Collignon p. 127 figs. Pl 366, figs 1597, 1598 |
| 1985 | Calycoceras (Newboldiceras) annulatum Zaborski p. 32 figs. 35, 36 |
| 1991 | Calycoceras (Newboldiceras) annulatum Matsumoto and Skwarko p. 254 figs. Pl 3, figs 2-4 |
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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.
†Calycoceras (Newboldiceras) annulatum Collignon 1964
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 80.3 | 54.0 | 123.0 | 78.0 | 35.0 | |
| shell diameter | 3 | 229.6 | 166.0 | 390.0 | 187.0 | 123.7 | |
| shell inflation | 3 | 94.5 | 67.0 | 180.0 | 70.0 | 64.4 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Middle Cenomanian or 99.60000 to 93.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Cenomanian | Nigeria | Calycoceras annulatum (69527) | |
| Middle Cenomanian | Papua New Guinea | Calycoceras annulatum (177072) |