Whatever the phylogenetic relationship among bilaterians and the diploblastic phyla, there was clearly a significant expansion in genomic information within the internode that connects the bilaterian clade to other branches.
Source: wiktionary
Bilaterian
Synonyms for "bilaterian"
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Sample sentences
3 total sentences available.
Lacking body cavities and both circulatory and excretory organs, with subepidermal nerve plexuses and 'brains' represented, if at all, by thickened anterior commissures, and with simple reproductive set-ups, acoels come close to representing a model stem ancestor for bilaterians.
Source: wiktionary
In most bilaterians, the gut musculature and most vascular muscles derive from the mesoderm.
Source: wiktionary