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Somasteroidea
Taxonomy
Somasteroidea was named by Spencer (1951). It is not extant. It was considered monophyletic by Dean Shackleton (2005).
It was reranked as the subclass Somasteroidea by Spencer (1951), Spencer and Wright (1966) and Sepkoski (2002); it was reranked as the class Somasteroidea by Blake and Guensburg (1993), Blake (2013) and Blake (2018); it was reranked as the order Somasteroida by Dean Shackleton (2005); it was reranked as the family Somasteroidea by Hunter and Ortega-Hernández (2021).
It was assigned to Stelleroidea by Spencer and Wright (1966); to Stelleroidea by Blake and Guensburg (1993); to Echinodermata by Spencer (1951) and Sepkoski (2002); and to Asterozoa by Owen (1965), Blake (1989), Dean Shackleton (2005), Blake (2013), Blake (2018) and Hunter and Ortega-Hernández (2021).
It was reranked as the subclass Somasteroidea by Spencer (1951), Spencer and Wright (1966) and Sepkoski (2002); it was reranked as the class Somasteroidea by Blake and Guensburg (1993), Blake (2013) and Blake (2018); it was reranked as the order Somasteroida by Dean Shackleton (2005); it was reranked as the family Somasteroidea by Hunter and Ortega-Hernández (2021).
It was assigned to Stelleroidea by Spencer and Wright (1966); to Stelleroidea by Blake and Guensburg (1993); to Echinodermata by Spencer (1951) and Sepkoski (2002); and to Asterozoa by Owen (1965), Blake (1989), Dean Shackleton (2005), Blake (2013), Blake (2018) and Hunter and Ortega-Hernández (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Somasteroidea Spencer p. 91 |
| 1965 | Somasteroidea Owen p. 543 |
| 1966 | Somasteroidea Spencer and Wright p. U39 |
| 1989 | Somasteroidea Blake p. 211 |
| 1993 | Somasteroidea Blake and Guensburg p. 106 |
| 2002 | Somasteroidea Sepkoski |
| 2005 | Somasteroida Dean Shackleton p. 64 |
| 2013 | Somasteroidea Blake p. 355 |
| 2018 | Somasteroidea Blake p. 21 |
| 2021 | Somasteroidea Hunter and Ortega-Hernández p. 2 |
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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.
Cl. †Somasteroidea Spencer 1951
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Fm. †Chinianasteridae Spencer 1951
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G. †Villebrunaster Spencer 1951
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†Villebrunaster fezouataensis Hunter and Ortega-Hernández 2021
Invalid names: Ampullaster Fell 1963 [synonym], Cantabrigiaster Hunter and Ortega-Hernández 2021 [synonym]
Invalid names: Villebrunasteridae Fell 1963 [synonym]
Invalid names: Archegonasteridae Spencer 1951 [empty]
Diagnosis
No diagnoses are available