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Metaderoceras gemmellaroi evolutum
Taxonomy
Deroceras evolutum was named by Fucini (1924).
It was recombined as Metaderoceras evolutum by Thomson and Smith (1992), Smith and Tipper (1996), Rakús and Guex (2002); it was synonymized subjectively with Metaderoceras gemmellaroi by Meister and Friebe (2003); it was recombined as Metaderoceras gemmellaroi evolutum by Geczy and Meister (2007).
It was recombined as Metaderoceras evolutum by Thomson and Smith (1992), Smith and Tipper (1996), Rakús and Guex (2002); it was synonymized subjectively with Metaderoceras gemmellaroi by Meister and Friebe (2003); it was recombined as Metaderoceras gemmellaroi evolutum by Geczy and Meister (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Deroceras evolutum Fucini |
| 1992 | Metaderoceras evolutum Thomson and Smith p. 22 figs. Pl 9, figs 5,6 |
| 1996 | Metaderoceras evolutum Smith and Tipper p. 44 figs. Pl 16, Figs 3-5, 7; Pl 18, fig 1; Txt-figs 33b, 34a |
| 2002 | Metaderoceras evolutum Rakús and Guex p. 107 figs. Pl 27, figs 1-3; pl 28, figs 1,2,4,6; text-fig 83 |
| 2007 | Metaderoceras gemmellaroi evolutum 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.
†Metaderoceras gemmellaroi evolutum Fucini 1924
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 14.0 | 9.00 | 23.4 | 12.9 | 7.45 | |
| shell diameter | 3 | 48.2 | 31.0 | 88.0 | 41.0 | 30.4 | |
| shell inflation | 3 | 20.3 | 16.0 | 25.5 | 20.5 | 4.75 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Whiteavesi or 189.20000 to 186.20000 Ma
Collections (41 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Jurassic | Canada (British Columbia) | Metaderoceras evolutum (199611 199615 199618 199644) | |
| Early/Lower Pliensbachian | Mexico (Sonora) | Metaderoceras evolutum (208264 208265 208266) | |
| Early/Lower Pliensbachian | Canada (British Columbia) | Metaderoceras evolutum (198419 198423 198426 198451 198489) | |
| Early/Lower Pliensbachian | USA (Nevada) | Metaderoceras evolutum (207900 207924) | |
| Ibex | Tunisia | Metaderoceras evolutum (84277 170524 170552) | |
| Ibex | Spain (Aragon) | Metaderoceras evolutum (146715) | |
| Ibex | Canada (British Columbia) | Metaderoceras evolutum (32849 55550) | |
| Ibex | Morocco | Metaderoceras gemmellaroi (148879) | |
| Ibex | Hungary (Veszprém Megye) | Metaderoceras evolutum (81551) | |
| Pliensbachian | Canada (British Columbia) | Metaderoceras evolutum (33189 33212 33230 33232 33236 199682) | |
| Imlayi | Canada (British Columbia) | Metaderoceras evolutum (32804 33168 33184) | |
| Whiteavesi | Canada (British Columbia) | Metaderoceras evolutum (32780 32782 32842 32845 32847 32848 32850 33134 33135 33173) |