|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
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.
|R. D. Lewis et al. 1987||A large rhipidocystid eocrinoid with relatively short, asymmetrical theca composed of 15 plates with concentric to labyrinthine ridges on thin plates in central area of both faces; brachioles numerous, short, normal biserial; ambulacra four(?), two extend slightly down faces of theca; stem apparently normal, attached, proximally to three thecal plates and attached distally, at least in juvenile stage, to conical holdfast.|