Ceramium periconicum sp. nov. (Ceramiaceae, Rhodophyta): a new subtidal species from Baja California Sur, Mexico
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Tae Oh Cho
Abstract
Ceramium periconicum sp. nov. is described from Baja California Sur, Mexico based on the developmental morphology of vegetative and reproductive plants. The new species is characterized by 4–5 periaxial cells, three cortical initials per periaxial cell (a third of which are produced by vertical division and situated between adjacent periaxial cells), absence of basipetal cortical filaments, and by projecting tetrahedral tetrasporangia in seriate series in an abaxial row. Thalli are less than 3 mm tall and occur in dense tufts. C. periconicum differs from most incompletely corticated Ceramium species in that each periaxial cell divides to produce three cortical initials. Within the genus, three cortical initials per periaxial cell have been reported in C. codii and C. reptans. C. periconicum differs from these species in that two cortical initials are directed acropetally and the third is directed laterally, having been cut off vertically from the periaxial cell and maturing without further divisions between the two adjacent periaxial cells. C. periconicum is also distinguishable from other Ceramium species, such as C. australe, C. clarionense, C. macilentum, C. shepherdii, C. caudatum, C. mazatlanense, and C. personatum by the absence of basipetal cortical filaments and by the sequential production of tetrasporangia from the abaxial sides of fertile axes.
©2008 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Review
- Alien marine macrophytes in Greece: a review
- Research articles
- Effects of erosion and macroalgae on intertidal eelgrass (Zostera marina) in a northeastern Pacific estuary (USA)
- A reassessment of Halophila species (Hydrocharitaceae) diversity with special reference to Japanese representatives
- Survey and phytochemical analysis of seagrasses in the Gulf of Mannar, southeast coast of India
- Temperature response in a shallow-water Mediterranean population of Caulerpa racemosa var. cylindracea (Caulerpales, Chlorophyta), and a possible strategy of season anticipation
- Dynamics and patterns of algal colonization on mechanically damaged and dead colonies of the coral Porites lutea
- Toxicity, morphology and distribution of Pseudo-nitzschia calliantha, P. multistriata and P. multiseries (Bacillariophyta) from the northwestern Sea of Japan
- Ceramium periconicum sp. nov. (Ceramiaceae, Rhodophyta): a new subtidal species from Baja California Sur, Mexico
- Seaweed polysaccharides with anticancer potential
- Iron, zinc, copper, lead and cadmium contents in Ruppia maritima from a Mediterranean coastal lagoon: monthly variation and distribution in different plant fractions
- Taxonomy and molecular phylogeny of Arthrobotrys mangrovispora, a new marine nematode-trapping fungal species
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