Sentence Examples with the word Echiuroidea

SIPUNCULOIDEA, marine animals of uncertain affinities, formerly associated with the Echiuroidea in the group Gephyrea.

This form of nephridia leads to the shorter but essentially similar organs in the Polychaete Sternaspis, and to those of the Echiuroidea (q.v.) and of the Gephyrea.