Abstract
Three species of umagillid turbellarians were found to have different nutritional relationships with their echinoid hosts: Syndisyrinx franciscanus ingests host intestinal tissue and ciliates that are symbiotic in the intestine of the host; Syndesmis dendrastrorum consumes intestinal tissue and materials that have been ingested by the host; an umagillid that closely resembles Syndesmis echinorum subsists entirely on host intestinal tissue.
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Shinn, G.L. The diet of three species of umagillid neorhabdocoel turbellarians inhabiting the intestine of echinoids. Hydrobiologia 84, 155–162 (1981). https://doi.org/10.1007/BF00026174
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DOI: https://doi.org/10.1007/BF00026174