Definition of Bilaterian. Meaning of Bilaterian. Synonyms of Bilaterian

- among most bilaterians, where the sense organs and central nerve ganglia become concentrated at the front end of the animal. Bilaterians constitute one...
- symmetric and significantly cephalised body plan, and the vast majority of bilaterians belong to two large superphyla: the protostomes, which includes organisms...
- the difference in the neuraxis, or if an invertebrate is a non-bilaterian. A non-bilaterian has no anterior or posterior surface for example but can still...
- front and back ends. All known bilaterian animals are triploblastic, and all known triploblastic animals are bilaterian. Living echinoderms (sea stars...
- ἑλμινθ-), helminth-, meaning "worm") is a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates commonly called flatworms or flat...
- important characteristic, and forms the morphological basis for separating bilaterian animals into two natural groupings: the protostomes and deuterostomes...
- practical purposes, coelom characteristics have been used to classify bilaterian animal phyla into informal groups. The term coelom derives from the Ancient...
- German ur- 'original') is the hypothetical last common ancestor of the bilaterian clade, i.e., all animals having a bilateral symmetry. Its appearance is...
- monophyletic and therefore continues to be used as such. The original bilaterian is hypothesized to be a bottom dwelling worm with a single body opening...
- nets seen in acoels (basal bilaterians) and cnidarians are thought to be the ancestral condition for the Planulozoa (bilaterians plus cnidarians and, perhaps...