Explore: Echinoderms"

largest marine-only phylum. The first definitive echinoderms appeared near the start of the Cambrian. Echinoderms are important both ecologically and geologically

be echinoderms, though the outmoded calcichordate hypothesis held that they were ancestral to both echinoderms and chordates. Within echinoderms, one

The list of echinoderms of South Africa is a list of species that form a part of the echinoderm (Phylum Echinodermata) fauna of South Africa, and includes

of prehistoric echinoderms is an attempt to create a comprehensive listing of all genera that have ever been included in the Echinoderms that have been

Irish Echinoderms". Proceedings of the Royal Irish Academy, Section B. 24: 231–267. JSTOR 20516926. O'Connor, Brendan (1981). "Some Echinoderms from the

the country. Echinoderms belong to the phylum Echinodermata. They are deuterostomes that are closely related to chordates. Echinoderms are characterized

and keeps the reef warm enough for them to survive. This is a list of echinoderms of the Houtman Abrolhos: Capillaster multiradiatus Clarkcomanthus littoralis

now widely agreed to belong to the echinoderm total group. Debate remains over whether they are stem-group echinoderms which predate the origin of radial

texanum Smith & Rader, 2009; Lower Albian, Texas, USA List of prehistoric echinoderms List of prehistoric echinoids Plagiochasma on the Natural History Museum

Eleutherozoa is a subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube