Cyclotella glomerata Bachmannの実体および木崎湖産珪藻の新組み合わせ : Discostella nipponica (Skvortzov) Tuji et Williams comb. et stat. nov.(珪藻綱)(英文)

概要

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Type material of Cyclotella glomerata Bachmann and seven recently collected samples were examined to establish the identity of this species. C. glomerata has a central rimoportula at the central area of the valve face and forms colonies; several marginal fultoportulae occur on the ribs. Thus, this taxon is not a member of the new genus Discostella, which includes the Cyclotella stelligera group, but is similar to other species in Cyclotella. In addition, isotype material of C. glomerata f. nipponica Skvortzov was examined. It does not share significant characters with C. glomerata but has characters that place it in Discostella. Thus, we propose the new combination Discostella nipponica (Skvortzov) Tuji et D. M. Williams.
2006-03-22