Definition of pterobranch in English:

pterobranch

Line breaks: ptero|branch
Pronunciation: /ˈtɛrə(ʊ)braŋk
 
/

noun

Zoology
  • A minute tube-dwelling colonial acorn worm found chiefly in deep water.
    • Class Pterobranchia, phylum Hemichordata
    More example sentences
    • The SSU data supported enteropneust paraphyly by placing acorn worms of the family Ptychoderidae as the sister to a group consisting of pterobranchs + acorn worms of the family Harrimaniidae.
    • Previously, hemichordates were thought to be paraphyletic, with enteropneusts (acorn worms) more closely related to chordates and pterobranchs closer to echinoderms.
    • The ciliary bands on the phoronid and brachiopod tentacles are upstream-collecting bands with separate cilia on monociliate cells just like those of larvae or adults of pterobranchs, echinoderms and enteropneusts.

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