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Troedssonellidae
Taxonomy
Troedssonellidae was named by Kobayashi (1935). Its type is Troedssonella.
It was assigned to Michelinoceratida by Hook and Flower (1977); to Orthocerida by Crick (1981); to Troedssonellaceae by Zhuravleva (1994); and to Dissidocerida by Evans (2005), Evans (2011) and Kröger and Evans (2011).
It was assigned to Michelinoceratida by Hook and Flower (1977); to Orthocerida by Crick (1981); to Troedssonellaceae by Zhuravleva (1994); and to Dissidocerida by Evans (2005), Evans (2011) and Kröger and Evans (2011).
Subtaxa
Buttsoceras, Cyclobuttsoceras, Moridunoceras, Oxfordoceras, Sheshanoceras, Tajaroceras, Thoraloceras, Troedssonella (type genus)
Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Troedssonellidae Kobayashi |
| 1977 | Troedssonellidae Hook and Flower |
| 1981 | Troedssonellidae Crick p. 228 |
| 1994 | Troedssonellidae Zhuravleva p. 131 |
| 2005 | Troedssonellidae Evans |
| 2011 | Troedssonellidae Evans |
| 2011 | Troedssonellidae Kröger and Evans |
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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.
Fm. †Troedssonellidae Kobayashi 1935
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G. †Buttsoceras Ulrich and Foerste 1933
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†Buttsoceras adamsi Butts 1926
†Buttsoceras atticus Billings 1865
†Buttsoceras novemexicanum Flower 1962
†Buttsoceras odenvillense Ulrich et al. 1944
†Buttsoceras vandiverense Ulrich et al. 1944
†Buttsoceras williamsi Flower 1962
G. †Cyclobuttsoceras Chen 1976
G. †Oxfordoceras Ulrich et al. 1944
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†Oxfordoceras atticus Billings 1865
†Oxfordoceras billingsi Ulrich et al. 1944
G. †Sheshanoceras Chen 1984
G. †Troedssonella Kobayashi 1935
Diagnosis
No diagnoses are available