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...
- front and back ends. All known bilaterian animals are triploblastic, and all known triploblastic animals are bilaterian. Living echinoderms (sea stars...
- 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...
- accompanied or facilitated other important evolutionary developments: the bilaterian body plan, the coelom, and metamerism, in which the body was built of...
- system consists of a nerve net, a diffuse network of isolated cells. In bilaterian animals, which make up the great majority of existing species, the nervous...
- 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...
- Xenacoelomorpha (/ˌzɛnəˌsɛloʊˈmɔːrfə/) is a small phylum of bilaterian invertebrate animals, consisting of two sister groups: xenoturbellids and acoelomorphs...
- symmetric and significantly cephalised body plan, and the vast majority of bilaterians belong to two large superphyla: the protostomes, which includes organisms...