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Protremaster
Taxonomy
Protremaster was named by Smith and Tranter (1985) [Sepkoski's age data: J Sine]. It is not extant. Its type is Protremaster universalis. It was considered monophyletic by Smith and Tranter (1985) and Gale (2018).
It was assigned to Tremasterinae by Smith and Tranter (1985); to Valvatida by Sepkoski (2002); to Korethrasteridae by Gale (2011); and to Korethrasteridae by Gale (2018).
It was assigned to Tremasterinae by Smith and Tranter (1985); to Valvatida by Sepkoski (2002); to Korethrasteridae by Gale (2011); and to Korethrasteridae by Gale (2018).
Species
P. universalis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1985 | Protremaster Smith and Tranter p. 351 |
| 2002 | Protremaster Sepkoski |
| 2011 | Protremaster Gale p. 62 |
| 2018 | Protremaster Gale p. 295 |
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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. †Protremaster Smith and Tranter 1985
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†Protremaster universalis Smith and Tranter 1985
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. B. Smith and T.H. Tranter 1985 | A genus of Tremasterinae with only a single serie of actinal plates separating the inframarginals and the adambulacrals | |
| A.S. Gale 2018 | Korethrasterids with short arms and broad interradii, in which the interradial ducts are closed abactinally but open actinally. The abactinal surface is composed of small, robust imbricating ossicles set in diagonal rows. |