Morphological and electrophoretic investigations of selected species of Chaetomorpha (Chlorophyta; Cladophorales)

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Abstract
The taxonomic separation of C. linum and C. atrovirens was evaluated by morphological analyses of field and herbarium specimens, and through starch gel electrophoretic analysis of genetic similarities. C. aerea and C. melagonium were also assessed electrophoretically and compared with the above species, C. linum and C. atrovirens appear to be distinct species based upon their morphological discontinuity and low degree of electrophoretic similarity. The 2 spp. are separable by their mean length/width ratios (LWR). C. linum has a mean LWR of < 1.5 and filament widths of 150-450 .mu.m, while C. atrovirens has a LWR > 2.0 and filament widths of 200-400 .mu.m. Electrophoretic information regarding the separation of C. linum and C. aerea is presented and possible phylogenetic relationships between C. linum, C. atrovirens, C. melagonium and C. aerea are discussed.

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