Cutler, Edward B. Formerly, Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts.
Schulze, Anja Department of Marine Biology, Texas A&M University, Galveston, Texas.
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A phylum of sedentary marine vermiform coelomates, commonly called peanut worms, that are unsegmented, but possibly distantly related to the annelids. There are 17 genera and approximately 150 species of sipunculans living in a wide variety of oceanic habitats within the sediment or inside any protective shelter such as a discarded mollusk shell, foraminiferan test, or crevice in rock or coral. See also: Annelida
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