Body continued into one or two caudal appendages, which bear hollow papillae. The papillae are ventral to the anus. The introvert forms 1/4 to 1/3 of the total body length; it is covered with spines in conspicuous longitudinal rows. The rest of the body is ringed. The retractor muscles are numerous and are attached to the body-wall, some anteriorly and some posteriorly.
Sorry, there are no scientific synonyms and common names available for this taxon
Shipley, A.E., 1901. Gephyrea and Phoronis. In: The Cambridge Natural History (Harmer, S.F. & A.E. Shipley, eds.). MacMillan and Co., Ltd. London.
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