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Issue: Vol. 687 No. 1: 13 Feb. 2025
Type: Article
Published: 2025-02-13
DOI: 10.11646/phytotaxa.687.1.5
Page range: 65-83
Abstract views: 124
PDF downloaded: 6

Actinocyclus aquae-dulcis sp. nov. (Coscinodiscophyceae, Coscinodiscales, Hemidiscaeae), a new centric diatom from Lake Akan and northern coasts of Japan

College of Agriculture, Food and Environment Sciences, Department of Environmental and Symbiotic Science, Rakuno Gakuen University. Bunkyodai 582, Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
College of Agriculture, Food and Environment Sciences, Department of Environmental and Symbiotic Science, Rakuno Gakuen University. Bunkyodai 582, Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
Department of Botany, National Museum of Nature and Science, 4–1–1 Amakubo, Tsukuba, Ibaraki 305–0005, Japan
Department of Biology, Bunkyo University, Saitama, Japan, Minamiogishima 3337, Koshigaya, Saitama 343–8511, Japan
Actinocyclus diatoms freshwater lake new species Algae

Abstract

Morphological classification and molecular analysis were performed on a diatom species of the genus Actinocyclus collected from freshwater Lake Akan, eastern Hokkaido, Japan. This species is characterized by possessingmultiple horseshoe-shaped rimoportulae, a feature not found in other Actinocyclus species. This species was reported in a previous study, in which it was given the tentative species name and in this paper, we formally define the taxon as a new species as Actinocyclus aquae-dulcis. We also report another occurrence of A. aquae-dulcis sp. nov. from the Yoneshiro River mouth area, Akita, Japan.

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How to Cite

Chiba, T., Osada, R., Tuji, A. & Idei, M. (2025) Actinocyclus aquae-dulcis sp. nov. (Coscinodiscophyceae, Coscinodiscales, Hemidiscaeae), a new centric diatom from Lake Akan and northern coasts of Japan. Phytotaxa 687: 65–83. https://doi.org/10.11646/phytotaxa.687.1.5