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Yokoyamaoceras
Taxonomy
Yokoyamaoceras was named by Wright and Matsumoto (1954) [Sepkoski's age data: K Turo , K Coni]. It is not extant.
It was assigned to Puzosiinae by Kennedy (1986); to Kossmaticeratinae by Wright (1996), Kennedy and Summesberger (1999); to Kossmaticeratidae by Wright and Matsumoto (1954), Toshimitsu and Hirano (2000); and to Ammonoidea by Sepkoski (2002).
It was assigned to Puzosiinae by Kennedy (1986); to Kossmaticeratinae by Wright (1996), Kennedy and Summesberger (1999); to Kossmaticeratidae by Wright and Matsumoto (1954), Toshimitsu and Hirano (2000); and to Ammonoidea by Sepkoski (2002).
Species
Species lacking formal opinion data
Entered
by A. Hendy on 2006-07-15
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Yokoyamaoceras Wright and Matsumoto |
| 1986 | Yokoyamoceras Kennedy p. 22 |
| 1996 | Yokoyamaoceras Wright |
| 1999 | Yokoyamaoceras Kennedy and Summesberger p. 25 |
| 2000 | Yokoyamaoceras Toshimitsu and Hirano |
| 2002 | Yokoyamaceras Sepkoski |
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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. †Yokoyamaoceras Wright and Matsumoto 1954
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†Yokoyamoceras jimboi Matsumoto 1955
Diagnosis
No diagnoses are available