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Xyrospondylus
Taxonomy
Xyrospondylus was named by Reisz et al. (1982). It is not extant.
It was assigned to Pelycosauria by Reisz (1986); and to Pelycosauria by Reisz et al. (1982) and Carroll (1988).
It was assigned to Pelycosauria by Reisz (1986); and to Pelycosauria by Reisz et al. (1982) and Carroll (1988).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1982 | Xyrospondylus Reisz et al. |
| 1986 | Xyrospondylus Reisz |
| 1988 | Xyrospondylus Carroll |
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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.
Diagnosis
No diagnoses are available