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Biol Bull 145: 598-606. (December 1973)
© 1973 Marine Biological Laboratory
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A NEW DESCRIPTION OF SYNDESMIS DENDRASTRORUM (PLATYHELMINTHES, TURBELLARIA), AN INTESTINAL RHABDOCOEL INHABITING THE SAND DOLLAR DENDRASTER EXCENTRICUS

NOEL S. SMITH 1

1 Department of Developmental and Cell Biology, University of California, Irvine, Irvine, California 92644

1. Syndesmis dendrastrorum occurs in the intestine of the sand dollar Dendraster excentricus.

2. A detailed redescription of S. dendrastrorum is presented, clarifying the internal relationships of the reproductive organs.

3. The most distinguishing characteristics of this species include single ovaries and testes occurring in a cis relationship, and a large male antrum.

4. Juvenile stages of S. dendrastrorum possess only a digestive system and lack reproductive organs.






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Copyright © 1973 by the Marine Biological Laboratory.