|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Eocrinoidea - Trachelocrinida - Trachelocrinidae
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.
|J. Sprinkle 1973||Eocrinoids (?) with an irregular globular calyx lacking epispires, well-developed columnal-bearing stem, and unusual food-gathering appendages consisting of 3-5 biserial "arms" (= ambulacra?) bearing biserial "pinnules" (= brachioles?) attached together to a single projection containing the mouth on the calyx summit. Middle(?)-late Cambrian.|