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Ambigaster
Taxonomy
Ambigaster was named by Blake and Elliott (2003). It is not extant. Its type is Monaster wandageensis.
It was assigned to Neopalaeasteridae by Blake and Elliott (2003); and to Permasteridae by Blake (2018).
It was assigned to Neopalaeasteridae by Blake and Elliott (2003); and to Permasteridae by Blake (2018).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Ambigaster Blake and Elliott p. 483 |
| 2018 | Ambigaster Blake p. 47 |
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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. †Ambigaster Blake and Elliott 2003
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†Ambigaster carnarvonensis Kesling 1969
†Ambigaster coleyi Webster and Jell 1992
†Ambigaster wandageensis Kesling 1969
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Blake and D. R. Elliott 2003 | Primary circlet ossicles moderately enlarged relative to adjacent ossicles; interradials similar to, smaller than radials; "extraneous" or "x" ossicles developed. Carinals in single series, ossicles not abutted; no lateral series. Marginals in single series, ossicle robust, equidimensional; marginals, adambulacrals together forming rounded arm margin. |
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||