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Free Content The family Sipunculidae (Sipuncula): body wall structure and phylogenetic relationships

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The sipunculan family Sipunculidae, common in Florida waters, contains five genera (Phascolopsis, Siphanomecus, Siphanasoma, Sipunculus, and Xenasiphon). Eight morphological characters of these genera are evaluated from an evolutionary standpoint with particular attention to the nature of the body wall and the form of the coelomic extensions into this wall. These characters are used in a phylogenetic analysis, and an evolutionary hypothesis is presented which includes the description of a hypothetical ancestor to this family (identical to present-day Phascolopsis).

Document Type: Research Article

Publication date: May 1, 1986

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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