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Retrotornoceras
Taxonomy
Retrotornoceras was named by House (2002). It is not extant. Its type is Retrotornoceras alobatum.
It was assigned to Tornoceratidae by House (2002); and to Tornoceratinae by Söte et al. (2021).
It was assigned to Tornoceratidae by House (2002); and to Tornoceratinae by Söte et al. (2021).
Species
R. alobatum (type species), R. juxi
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Retrotornoceras House |
| 2021 | Retrotornoceras Söte et al. p. 261 |
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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.
G. †Retrotornoceras House 2002
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†Retrotornoceras alobatum House 2002
†Retrotornoceras juxi Söte et al. 2021
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 3 | 2.87 | 1.73 | 3.80 | 3.60 | 1.14 | |
| shell diameter | 3 | 5.95 | 4.80 | 7.30 | 6.00 | 1.25 | |
| shell inflation | 3 | 1.10 | 0.900 | 1.35 | 1.10 | 0.225 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: Late/Upper Frasnian or 375.20000 to 372.15000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Frasnian | United Kingdom (England) | R. alobatum (135957) | |
| Late/Upper Frasnian | Germany (Nordrhein-Westfalen) | R. juxi (220476) |