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Hemichordata US English

A small phylum of marine invertebrates that comprises the acorn worms

Hemichordata in acorn worm US English

A burrowing wormlike marine animal of shallow waters. Its body consists of a proboscis, a collar, and a long trunk with gill slits, and contains a notochordlike structure

Hemichordata in graptolite US English

An extinct marine invertebrate animal of the Paleozoic era, forming mainly planktonic colonies and believed to be related to the pterobranchs

Hemichordata in hemichordate US English

A marine invertebrate of the phylum Hemichordata; an acorn worm

Hemichordata in pterobranch US English

A minute tube-dwelling colonial acorn worm found chiefly in deep water