A marine invertebrate of the group Urochordata, which comprises the tunicates.
- ‘For instance, adult urochordates are typically sessile, while many vertebrates are quite active.’
- ‘Chordates are divided into urochordates, cephalochordates, and vertebrates.’
- ‘Their report that urochordates are comprised of 4 discrete lineages holds interesting implications for understanding the evolution of tadpole morphology and chordate life history.’
- ‘The urochordates or tunicates are sessile (attached to the bottom) marine filter-feeders, and rather sponge-like as adults.’
- ‘In particular, there is a significant phylogenetic gap in information for the urochordates, a subphylum near the invertebrate-vertebrate transition.’
Relating to or denoting urochordates.
- ‘This suggests that the disruption observed is specific to the urochordate lineage.’
- ‘The phylogenic analysis implies that the multiple actinin isoforms found in modern vertebrates arose after the divergence of the vertebrate and urochordate lineages.’
- ‘The authors added many new hemichordate and urochordate taxa to the database and found strongly supported relationships among the major deuterostome groups.’
- ‘These data further support the hypothesis that duplication and differentiation giving rise to cardiac and skeletal genes occurred following divergence of the urochordate and vertebrate ancestors.’