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A pink to red-pigmented cryptophyte of undetermined taxonomic affinity was isolated and cloned from two seasonally ice-covered, meromictic, saline Antarctic aquatic environments, Bayly Bay (B and Ace Lake (AL). The clones shared a number of morphological and ultrastructural similarities with other cryptomonad genera which confounded identification by light and electron microscopy. Cellular pigments extracted from the AL clone showed an absorption maximum corresponding to the biliprotein Cr-phycoerythrin 545, thus narrowing its potentia