Bilateria (/ ˌ b aɪ l ə ˈ t ɪər i ə /) [5] 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 a front (or "head") and a rear (or "tail") end, as well …

The meaning of BILATERIA is taxonomic synonym of exocycloida. New Latin, from bi- entry 1 + Latin later-, latus side + New Latin -ia. Plural noun. 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

Bilateria (/ ˌ b aɪ l ə ˈ t ɪər i ə /) [5] 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 a front (or "head") and a rear (or "tail") end, as well as a left–right–symmetrical belly ( ventral ) and back ( dorsal ) surface.

Starting from Bilateria (left), a protostome lineage leading to dipterans (upper) and a deuterostome lineage leading to mammals (lower) are shown as schematic phylogenetic tree. Sister clades to the selected taxa are denoted on short branches in the center.

The Origins and Diversity of Bilateria 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.

The new Bilateria includes the Cnidaria and the former Bilateria, now dubbed as Triploblastica, the latter split into a paraphyletic ‘Acoelomorpha’ (Acoela and Nemertodermatida) and the rest of the bilaterians or Nephrozoa.

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 coalition of tissues into organs. The body plans that are generally recognized are acoelomate, pseudocoelomate, and coelomate. Read More

Nov 15, 2023 · 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 phyla with true radial symmetry. All other Eumetazoa are members of the Bilateria clade.

The Bilateria are animals which are bilaterally symmetrical. They have front and a back end, an upside and downside, and a left and right side. Most animals are bilateral.

The bilateria or bilaterians are animals with bilateral symmetry, i.e., they have a downside (“anterior”) and a back front (“posterior”) as well as an upside (“dorsal”) and (“ventral”) side; therefore, they also have a left and a right side. The fundamental bilaterian body form is a tube with a hollow gut cavity running from ...