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Tribrachyocrinus
Taxonomy
Tribrachyocrinus was named by M'Coy (1847) [Sepkoski's age data: P Leon P Guad-u]. It is the type genus of Tribrachyocrinidae.
It was corrected as Tribrachiocrinus by Etheridge (1892).
It was assigned to Poteriocrinidae by Etheridge (1892); to Tribrachyocrinidae by Webster and Jell (1999); and to Cladida by Sepkoski (2002).
It was corrected as Tribrachiocrinus by Etheridge (1892).
It was assigned to Poteriocrinidae by Etheridge (1892); to Tribrachyocrinidae by Webster and Jell (1999); and to Cladida by Sepkoski (2002).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1847 | Pentadia Dana p. 152 |
| 1847 | Pentadia reniformis Dana p. 152 |
| 1847 | Pentadia spatangus Dana p. 152 |
| 1847 | Pentadia trigona Dana p. 152 |
| 1847 | Tribrachyocrinus M'Coy p. 228 |
| 1892 | Tribrachiocrinus Etheridge Jr. p. 82 |
| 1999 | Tribrachyocrinus Webster and Jell p. 329 |
| 2002 | Tribrachyocrinus Sepkoski |
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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. †Tribrachyocrinus M'Coy 1847
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†Tribrachyocrinus brogerensis Willink 1979
†Tribrachyocrinus clarkei M'Coy 1847
†Tribrachyocrinus corrugatus Ratte 1885
†Tribrachyocrinus etheridgei Willink 1979
†Tribrachyocrinus granulatus Etheridge Jr. 1892
†Tribrachyocrinus pseudoclarkei Willink 1979
†Tribrachyocrinus rattei Willink 1979
†Tribrachyocrinus singletonensis Willink 1979
Invalid names: Pentadia Dana 1847 [nomen dubium], Pentadia reniformis Dana 1847 [nomen dubium], Pentadia spatangus Dana 1847 [nomen dubium], Pentadia trigona Dana 1847 [nomen dubium]
Diagnosis
No diagnoses are available