One of the mysteries of the English language finally explained.
A minute tube-dwelling colonial acorn worm found chiefly in deep water.
Class Pterobranchia, phylum Hemichordata
- ‘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.’
- ‘There are two classes of hemichordate, the pterobranchs and the enteropneusts, which differ greatly in appearance and lifestyle.’
- ‘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.’
- ‘Previously, hemichordates were thought to be paraphyletic, with enteropneusts (acorn worms) more closely related to chordates and pterobranchs closer to echinoderms.’
- ‘Ax favors the Pharyngotremata hypothesis, but compiles evidence that not only the hemichordates but also the pterobranchs are paraphyletic grades.’
Top tips for CV writingRead more
In this article we explore how to impress employers with a spot-on CV.