If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email firstname.lastname@example.org
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).
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.