Abstracts of papers read at the Winter Meeting at the University of Surrey |
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Authors: | Stuart Sym Masanobu Kawachi |
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Affiliation: | 1. Department of Animal, Plant &2. Environmental Sciences, University of the Witwatersrand, Private Bag 3 WITS 2050, South Africa;3. National Institute of Environmental Sciences, 16-2 Onogawa Tsukuba, Ibaraki, 305-0053 Japan |
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Abstract: | A novel member of the Calyptrosphaeraceae surrounded by a hyaline sheath, with only one chloroplast and without an emergent haptonema, is tentatively described as a species of Calyptrosphaera Lohmann. It has an interrupted body to its single pyrenoid and a unique microtubular root complement with only one crystalline root (CR) nucleating on root 2 (R2). At preprophase it produces a CR1, lending support to the idea that these crystalline roots contribute to the mitotic spindle. It shares numerous ultrastructural traits with the heterococcolithophorid Cruciplacolithus neohelis but, although it is tempting to consider it a haploid phase of this organism, is distinct from it. |
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Keywords: | Calyptrosphaera radiata Calyptrosphaeraceae crystalline roots flagellar apparatus holococcolithophorid new species Prymnesiophycidae taxonomy ultrastructure |
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