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Thoralaster
Taxonomy
Thoralaster was named by Dean Shackleton (2005). It is not extant. It was considered monophyletic by Dean Shackleton (2005).
It was assigned to Somasteroidea by Blake (2013); and to Chinianasteridae by Dean Shackleton (2005) and Blake and Guensburg (2015).
It was assigned to Somasteroidea by Blake (2013); and to Chinianasteridae by Dean Shackleton (2005) and Blake and Guensburg (2015).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Thoralaster Dean Shackleton p. 68 |
| 2013 | Thoralaster Blake p. 363 |
| 2015 | Thoralaster Blake and Guensburg p. 472 |
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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. †Thoralaster Dean Shackleton 2005
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†Thoralaster spiculiformis Dean Shackleton 2005
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Dean Shackleton 2005 | Inferomarginals non-articulating; one inferomarginal to one ambulacral ossicle over entire arm; virgal length less than or equal to half of ambulacral width. |