Eocrinoidea

Eocrinoidea Temporal range:
	Eocrinoid holdfasts (Middle Ordovician, Utah)
	Colourful reconstruction of Gogia ojenai
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	†Blastozoa
Class:	†Eocrinoidea; Jaekel, 1899
Type genus
	†Eocrinus Jaekel 1918; (= †Gogia Walcott 1917)
Groups included
	†Ascocystitida †Ascocystitidae; †Cambrocrinidae; †Rhopalocystidae; †Ridersiidae; ; †Gogiida †Eocrinidae; †Lichenoididae; †Lyracystidae; †Thorntonitidae; †Turbanicystidae; ; †Imbricata †Felbabkacystidae; †Lepidocystidae; ; †Trachelocrinida †Heckerocrinidae; †Trachelocrinidae; ; †Ampheristocystidae; †Cryptocrinitidae; †Lingulocystidae; †Palaeocystitidae; †Rhipidocystidae; incertae sedis †Cigara (?); †Haimacystis; †Ubaghsicystis; ;
Cladistically included but traditionally excluded taxa
	†Rhombifera; †Diploporita; †Paracrinoidea; †Parablastoidea; †Blastoidea; †Coronoidea; Crinoidea (?);

The Eocrinoidea were an extinct class of echinoderms that lived between the Early Cambrian and Late Silurian periods. They are the earliest known group of stalked, brachiole-bearing echinoderms, and were the most common echinoderms during the Cambrian.

The earliest genera had a short holdfast and irregularly structured plates. Later forms had a fully developed stalk with regular rows of plates. They were benthic suspension feeders, with five ambulacra on the upper surface, surrounding the mouth and extending into a number of narrow arms.