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ALGAE > Volume 16(1); 2001 > Article
ALGAE 2001;16(1): 45-52.
The Developmental Morphology of Ceramium procumbens (Ceramiaceae, Rhodophyta) from the Gulf of California, Mexico
T.O. Cho, R. Riosmena-Rodriguez, S.M. Boo Department of Biology, Chungnam National University, Programa de Investigacion en Botanica Marina, Marine Biology Department, UABCS. Ap.
ABSTRACT
Developmental morphology of a previously little-known ceramiaceous red alga, Ceramium procumbens, was studied in details based on recent collections from the Gulf of California, Mexico. Thalli consist of prostrate axes with erect adventitious branches, and are incompletely corticated along axis. Four periaxial cells are produced in an alternating sequence from each axial cell. Spermatangia are completely covering terminal adventitious branches. Cystocarps are terminally situated on pedicel of adventitious branch and surrounded by two to three finger-like involucral branches. Tetrasporangia are produced on erect adventitious branches, being clavate in shape. Single tetrasporangium is produced in an alternating sequence per each periaxial cell and immersed in cortical node. Developmental morphology of vegetative and reproductive structures is described for the first time, which conforms to the previous descriptions of the genus.
Key words: Ceramium, Ceramiales, red algae, reproduction, structure, taxonomy


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