Deuterostome
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Deuterostomes are bilaterian animals of the superphylum Deuterostomia, which are typically characterized by their blastopore becoming their anus during embryonic development. Deuterostomia comprises t
Early deuterostomes and their modern counterparts
Echinoderm
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An echinoderm is any animal of the phylum Echinodermata, which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While
Deuterostome
…which are typically characterized by their blastopore becoming their anus during embryonic development. Deuterostomia comprises three phyla: Chordata, Echinodermata, Hemichordata, and the extinct clade Cambroernida. In deuterostomes, the developing embryo's first opening (the blastopore) becomes the anus and cloaca…
Echinoderm collage 2
A brittle star, Ophionereis reticulata
A sea cucumber, Stichopus chloronotus, from Malaysia
Starfish of varied colours