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Rioceras
Taxonomy
Rioceras was named by Flower (1964) [Sepkoski's age data: O Aren-u Sepkoski's reference number: 298,524]. It is not extant. Its type is Rioceras nondescriptum.
It was assigned to Baltoceratidae by Hook and Flower (1977) and Crick (1981); and to Rioceratidae by Kröger and Evans (2011) and Kröger and Lefebvre (2012).
It was assigned to Baltoceratidae by Hook and Flower (1977) and Crick (1981); and to Rioceratidae by Kröger and Evans (2011) and Kröger and Lefebvre (2012).
Species
R. consuetum, R. dartoni, R. depressum, R. escandei, R. expansum, R. fusiforme, R. lobatum, R. nondescriptum (type species), R. tubulare, R. wellsi
Synonymy list
| Year | Name and author |
|---|---|
| 1964 | Rioceras Flower p. 102 |
| 1977 | Rioceras Hook and Flower |
| 1981 | Rioceras Crick p. 227 |
| 2011 | Rioceras Kröger and Evans p. 20 |
| 2012 | Rioceras Kröger and Lefebvre |
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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. †Rioceras Flower 1964
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†Rioceras consuetum Sardeson 1896
†Rioceras dartoni Flower 1964
†Rioceras depressum Flower 1964
†Rioceras escandei Thoral 1935
†Rioceras expansum Flower 1964
†Rioceras fusiforme Flower 1964
†Rioceras lobatum Flower 1964
†Rioceras nondescriptum Flower 1964
†Rioceras tubulare Flower 1964
†Rioceras wellsi Flower 1964
Diagnosis
No diagnoses are available