Rw. Holton et al., PHYLOGENETIC-RELATIONSHIPS OF THE FRESH-WATER ALGA BOLDIA ERYTHROSIPHON (COMPSOPOGONALES, RHODOPHYTA) BASED ON 18S RIBOSOMAL-RNA GENE-SEQUENCES, Journal of phycology, 34(3), 1998, pp. 555-557
The nuclear small-subunit ribosomal DNA sequence from the freshwater r
ed alga Boldia erythrosiphon Herndon emend Howard et Parker was determ
ined. Phylogenetic analysis confirms the positioning of this species w
ithin the bangiophycidean order of the Compsopogonales. The results st
rongly suggest that occupation of freshwater habitats by marine red al
gae has happened at least twice during red algal evolution.