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Lytoceras (Derolytoceras)
Taxonomy
Derolytoceras was named by Rosenberg (1909) [Sepkoski's age data: J Sine J Plie-u Sepkoski's reference number: 1066]. It is not extant. Its type is Derolytoceras tortum.
It was reranked as Lytoceras (Derolytoceras) by Hoffmann (2010).
It was assigned to Ammonoidea by Sepkoski (2002); to Lytoceratidae by Wiedmann (1970), Géczy and Meister (1998) and Meister and Friebe (2003); and to Lytoceras by Hoffmann (2010).
It was reranked as Lytoceras (Derolytoceras) by Hoffmann (2010).
It was assigned to Ammonoidea by Sepkoski (2002); to Lytoceratidae by Wiedmann (1970), Géczy and Meister (1998) and Meister and Friebe (2003); and to Lytoceras by Hoffmann (2010).
Subtaxa
Derolytoceras annulosum, Derolytoceras tortum (type species)
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1909 | Derolytoceras Rosenberg |
| 1970 | Derolytoceras Wiedmann p. 994 |
| 1998 | Derolytoceras Géczy and Meister |
| 2002 | Derolytoceras Sepkoski |
| 2003 | Derolytoceras Meister and Friebe |
| 2010 | Lytoceras (Derolytoceras) Hoffmann p. 24 |
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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.
Subg. †Lytoceras (Derolytoceras) Rosenberg 1909
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†Derolytoceras annulosum Monestier 1931
†Derolytoceras tortum Quenstedt 1885
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| shell height | 1 | 6.50 | |||||
| shell diameter | 1 | 19.9 | |||||
| shell inflation | 1 | 7.40 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Late/Upper Sinemurian to the top of the Bifrons or 196.50000 to 175.60000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sinemurian - Pliensbachian | Austria | Derolytoceras tortum (218903) | |
| Late/Upper Sinemurian | Austria | Derolytoceras sp. (196516) | |
| Late/Upper Sinemurian - Late/Upper Pliensbachian | Austria | Derolytoceras tortum (218932) | |
| Davoei | France | Derolytoceras tortum (148138 148142 148198) | |
| Davoei - Margaritatus | France | Derolytoceras tortum (148078 148091) | |
| Ibex | France | Derolytoceras tortum (146468 148069 148072 148100 148103 148104 148130) | |
| Ibex - Margaritatus | France | Derolytoceras tortum (147794) | |
| Margaritatus | France | Derolytoceras tortum (146605 148048 148136) | |
| Margaritatus | Italy | Derolytoceras tortum (196617) | |
| Margaritatus | Hungary | Derolytoceras tortum (109138 109497 109506 109532) | |
| Margaritatus | Austria | Derolytoceras tortum (145292) | |
| Bifrons | France | Derolytoceras annulosum (170432) |