Eocrinoidea

Paraphyletic group
name = Eocrinoidea
fossil_range = Cambrian - Silurian


image2_caption = Colourful reconstruction of "Gogia ojenai"

---

image_caption=Eocrinoid holdfasts (Middle Ordovician, Utah)
regnum = Animalia
phylum = Echinodermata
subphylum = Blastozoa
classis = Eocrinoidea
classis_authority = Jaekel, 1899
includes =
excluded = Blastoids

The Eocrinoidea ("dawn crinoids") are a paraphyletic division of echinoderms, in that the Blastoids are derived/descended from them. As with all sea lily-like echinoderms, they were sessile animals containing brachioles with a holdfast. The Blastoids later developed stalks. The body, and sometimes the holdfast, were covered by plates [ [http://www.ucmp.berkeley.edu/echinodermata/eocrinoidea.html The Eocrinoidea @ U Berkeley] ] .

References

External links

* [http://www.palaeos.com/Invertebrates/Echinoderms/Eocrinoidea/Eocrinoidea.htm Palaeos on Eocrinoids]
* [http://www.uwm.edu/~sdornbos/PDF's/Dornbos.2006.pdf Evolutionary palaeoecology of early epifaunal echinoderms: Response to ...]
* [http://faculty.evansville.edu/de3/b39903/PDFs/9_Cambrian.pdf Cambrian explosion with Eocrinoid information]