echiuroid

English

Noun

echiuroid (plural echiuroids)

1. A worm of the order Echiuroidea.
   • 1948, Proceedings of the United States National Museum, page 217:

     Descriptions of echiuroids based on external characters or on a very summary enumeration of a few internal features have made it difficult to determine the generic position of a number of described forms.

   • 1961, Ralph I. Smith, Frank A. Pitelka, Donald P. Abbott, Frances M. Weesner, Intertidal Inverterbrates of the Central California Coast, page 108:

     Despite the resemblances of echiuroids to annelids and to sipunculids, the embryological studies of Newby (1940) on Urechis, together with other evidence, seem to indicate that echiuroids are closer to annelids than they are to molluscs.

   • 2012, Diana R. Kershaw, Animal Diversity, →ISBN, page 198:

     Generally echiuroids are sedentary, remaining in their holes or burrows and extending the proboscis to feed.