Each radial canal has serially repeating pairs of ... The early phylogeny of chordates and echinoderms and the origin of chordate left-right symmetry and bilateral symmetry. Acta. Zool. 77: 101-122.

Keywords echinoderms, sea stars, sea urchins, sand dollars, radial symmetry, spiny skin, water vascular system, locomotion, feeding habits, regeneration, reproduction, scientific research Email us ...

Echinoderms are found in ocean ecosystems worldwide, from rocky shores to the deep sea. Animals in this phylum are characterized by radial symmetry as adults, with body parts that repeat around an ...

Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression ... of the five ‘rays’ of the star, along radial domains (ambulacra) that extend from ...

(While five-pointed starfish and other echinoderms feature radial symmetry in adulthood, they actually feature bilateral symmetry in their embryonic stages — a holdover from their ancient heritage.) ...

In particular, starfish, also called sea stars, have fivefold radial symmetry ... star and its equally-strange echinoderm siblings develop their unique starlike symmetry?