From Wikipedia, the free encyclopedia
Jump to: navigation, search
Temporal range: Late Ediacaran - Recent
Various sea stars and sea urchins among mussel shells in the rocky intertidal zone of Kachemak Bay.
Scientific classification
Kingdom: Animalia
Subkingdom: Eumetazoa
(unranked): Bilateria
Superphylum: Ambulacraria

Ambulacraria is a clade of invertebrate phyla which includes echinoderms, hemichordates, and Xenoturbellida; a member of this group is called an ambulacrarian. The Ambulacraria are part of the Deuterostomes, a larger clade that also includes the Chordata and Vetulicolia.

The three living phyla, with representative organisms, are:

Fossil taxa that may lie on the stem lineage: