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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), Blake and Guensburg (2015).
It was assigned to Somasteroidea by Blake (2013); and to Chinianasteridae by Dean Shackleton (2005), 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. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, p = phylum | |||||
| References: Aberhan et al. 2004, Spencer and Wright 1966, Aberhan 1992 | |||||
Age range: Tremadocian or 486.85000 to 477.10000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tremadocian | France (Languedoc-Roussillon) | T. spiculiformis (101705) |