urochord

NOUN
  1. primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva
  2. a notochord of a larval tunicate typically confined to the caudal region
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How To Use urochord In A Sentence

  • We chordates are deuterostomes, as are echinoderms, some marine worms called hemichordates, and the urochordates, or sea squirts.
  • In particular, there is a significant phylogenetic gap in information for the urochordates, a subphylum near the invertebrate-vertebrate transition.
  • Their report that urochordates are comprised of 4 discrete lineages holds interesting implications for understanding the evolution of tadpole morphology and chordate life history.
  • 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.
  • For instance, adult urochordates are typically sessile, while many vertebrates are quite active.
  • 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.
  • A chordate marine animal of the subphylum Urochordata; a tunicate.
  • The urochordates or tunicates are sessile (attached to the bottom) marine filter-feeders, and rather sponge-like as adults.
  • This suggests that the disruption observed is specific to the urochordate lineage.
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