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Meridiceras externum
Taxonomy
Meridiceras externum was named by Hillebrandt (2006). Its type specimen is TUB 841114/8/1, a shell, and it is a 3D body fossil. Its type locality is Quebrada Doña Inés Chica (sample 841114/8), which is in a Jamesoni/Ibex carbonate limestone in Chile. It is the type species of Meridiceras.
Synonymy list
| Year | Name and author |
|---|---|
| 2006 | Meridiceras externum Hillebrandt p. 61 figs. Pl 7, figs 12-16; pl 8, figs 1-5; pl 9, figs 1-10; pl 10, figs 1-3; text-fig 14c |
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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.
†Meridiceras externum Hillebrandt 2006
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 14 | 18.1 | 6.00 | 42.5 | 19.4 | 12.1 | |
| shell diameter | 14 | 57.6 | 18.1 | 146.8 | 60.6 | 45.4 | |
| shell inflation | 14 | 25.3 | 7.70 | 75.4 | 26.1 | 23.7 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Jamesoni | Chile | Meridiceras externum (181816 181817) | |
| Jamesoni - Ibex | Argentina | Meridiceras externum (181779 181793) | |
| Jamesoni - Ibex | Chile | Meridiceras externum (type locality: 181815 181818 181819 181820 181822) |