Morphology and taxonomy of Stephanodiscus suzukii sp. nov. and Stephanodiscus pseudosuzukii sp. nov. (Bacillariophyceae) from Lake Biwa, Japan, and S. carconensis from North America

Authors: Tuji A.; Kociolek J.P.

Source: Phycological Research, Volume 48, Number 4, December 2000 , pp. 231-239(9)

Publisher: Blackwell Publishing

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Abstract:

SUMMARY

Two new, recent diatoms, Stephanodiscus suzukii Tuji et Kociolek and Stephanodiscus pseudosuzukii Tuji et Kociolek are described from Lake Biwa, Japan, where they had been identified previously as Stephanodiscus carconensis Grunow var. carconensis and S. carconensis var. pusillus Grunow, respectively. These forms are compared in terms of valve ultrastructure with populations of S. carconensis from North America. The Japanese species differ from the North American specimens in characteristics related to the central fultoportula and rimoportula.

Keywords: Bacillariophyceae; Stephanodiscus carconensis var. pusillus; Stephanodiscus pseudosuzukii sp. nov; Stephanodiscus suzukii sp. nov; Stephanodiscus carconensis var. carconensis; taxonomy; valve ultrastructure