|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Crinoidea - Cladida - 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).
|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, Jr.|
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