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Micronautilus evolutus
Taxonomy
Micronautilus evolutus was named by Branger (2023). Its type specimen is 2021.BR.N.103, a shell, and it is a mold. Its type locality is Buffevent quarry, bed 8, which is in a Bathonian carbonate limestone in the Calcaire à Silex Formation of France. It is the type species of Micronautilus.
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Micronautilus evolutus Branger p. 482 figs. Appendix 1A-E |
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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.
†Micronautilus evolutus Branger 2023
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 7 | 18.3 | 15.0 | 22.0 | 19.0 | 2.70 | |
| shell diameter | 7 | 35.8 | 28.0 | 44.0 | 38.0 | 6.55 | |
| shell inflation | 7 | 6.03 | 4.00 | 9.00 | 6.30 | 2.08 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Late/Upper Bathonian or 168.20000 to 165.30000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Bathonian | France | Micronautilus evolutus (type locality: 217203 227619) | |
| Late/Upper Bathonian | France (Deux-Sèvres) | Pictonautilus verciacensis (167333) | |
| Middle Bathonian | France | Micronautilus evolutus (230608) |