|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Edrioasteroidea - Isorophida - Agelacrinitidae
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.
|T. E. Guensberg 1988||Agelacrinitidae with low domal theca, ambulacra straight, narrow, distal taper slight; oral area with four primary orals, unknown number of secondary orals; proximal floorplate of ambulacrum I forms left half of posterior frame gap and most of left posterior margin of central oral lumen; ambulacral coverplates probably forming double alternating biseries; valvular anal structure offset toward right center of interambulacrum; interambulacral plates squamose, imbricate; proximal circlet of peripheral rim plates large, with vertical tight-fitting mutual articulations, thick, wedge shaped in radial cross section, proximal upper edges elongated forming shelf.|