Bryoliths (Bryozoa) in the Gulf of California.

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2006-01
Authors
James, D.W.
Foster, M.S.
O’Sullivan, J.
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Honolulu, University of Hawaii Press
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Abstract
Populations of Diaperoforma californica (d’Orbigny) bryoliths were discovered in rhodolith beds, a sand habitat, and on a cobble bottom in the Gulf of California, Mexico, the first known observation of a modern free-living cyclostome bryozoan in the Northern Hemisphere. Densities ranged from a mean of 9.2 to 22.6 individuals/0.06 m2. Bryoliths from the deepest site were irregularly shaped and had the highest variation in shape; those from shallow sites were spheroidal. Water motion and bioturbation move the bryoliths and may determine their morphology. Schizomavella robertsonae (Soule, Soule & Chaney) bryoliths also occurred occasionally in one rhodolith bed sampled. Fossilized bryolith specimens of the cyclostome Diaperoforma californica (d’Orbigny) were found in a Pleistocene deposit near modern habitats.
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v. ill. 23 cm.
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James DW, Foster MS, O’Sullivan J. Bryoliths (Bryozoa) in the Gulf of California. Pac Sci 60(1): 117-124.
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8 p.
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