Bilateria ... Bilateria (/ ˌbaɪləˈtɪəriə /) [3] is a large clade of animals characterised by bilateral symmetry during embryonic development. This means their body plans are laid around a longitudinal axis with …

Eumetazoa are subdivided into radially-symmetrical animals and bilaterally-symmetrical animals and are classified into clade Radiata or Bilateria, respectively. The cnidarians and ctenophores are animal …

Bilaterality evolved once, early in the evolution of the clade known as Bilateria. The driving force for bilaterality was probably the evolution of active locomotion in search of food.

Bilateria (also referred to as "Bilateralia" in older literature): Monophyletic group containing most animals. In simple terms, bilaterians are animals with a distinct front, back, top, and bottom.

We belong to the phylum known as the bilateria, an ancient lineage that includes over 1.5 million present-day animal species, including such diverse creatures as soil nematodes, fruit flies, and …

In animal: Bilateria: an organ level of organization All animals except those in the four phyla mentioned above have bilaterally symmetrical ancestors and contain three body layers (triploblastic) with …

bilateria, New Latin, from bi- entry 1 + Latin later-, latus side + New Latin -ia; bilateralia, New Latin, from bi- entry 1 + Latin lateralia, neuter plural of lateralis lateral