actinotrocha definition

  • noun-plural:
    • A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.
  • noun:
    • An embryonic form of a gephyrean worm of genus Phoronis (which see), that was mistaken for a distinct animal and known as Actinotrocha branchiata.
    • The particular larval kind of Phoronis, an aberrant genus of marine worms of skeptical affinities, becoming sometimes classified with the Gephyrea, sometimes using the Molluscoidea, and often because of the Hemichordata.
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