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Gemmellaroceras aenigmaticum
Taxonomy
Aegoceras aenigmaticum was named by Gemmellaro (1884).
It was recombined as Gemmellaroceras aenigmatum by Hyatt (1900); it was recombined as Gemmellaroceras aenigmaticum by Bremer (1965), Smith and Tipper (1996), Rakús and Guex (2002) and Geczy and Meister (2007).
It was recombined as Gemmellaroceras aenigmatum by Hyatt (1900); it was recombined as Gemmellaroceras aenigmaticum by Bremer (1965), Smith and Tipper (1996), Rakús and Guex (2002) and Geczy and Meister (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Aegoceras aenigmaticum Gemmellaro p. 34 |
| 1900 | Gemmellaroceras aenigmatum Hyatt p. 574 |
| 1965 | Gemmellaroceras aenigmaticum Bremer |
| 1996 | Gemmellaroceras aenigmaticum Smith and Tipper p. 34 figs. Pl 6, figs 19-23; Txt fig 26e |
| 2002 | Gemmellaroceras aenigmaticum Rakús and Guex p. 119 figs. Pl 32, fig 11; text-fig 96 |
| 2007 | Gemmellaroceras aenigmaticum 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.
†Gemmellaroceras aenigmaticum Gemmellaro 1884
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 4 | 6.29 | 6.00 | 7.00 | 6.10 | 0.476 | |
| shell diameter | 4 | 19.0 | 17.0 | 21.8 | 18.8 | 2.11 | |
| shell inflation | 4 | 7.47 | 7.00 | 8.60 | 7.20 | 0.757 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Whiteavesi or 189.60000 to 186.70000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Pliensbachian | Canada (British Columbia) | Gemmellaroceras aenigmaticum (33141 33189 33256) | |
| Whiteavesi | Canada (British Columbia) | Gemmellaroceras aenigmaticum (32809) | |
| Jamesoni | Tunisia | Gemmellaroceras aenigmaticum (170522) | |
| Jamesoni | Hungary | Gemmellaroceras aenigmaticum (80160) |