Actinocyclus pseudopodolicus sp. nov. and infraspecific complex of A. octonarius (Bacillariophyta) from Holocene sediments of the Sea of Azov


R. M. Gogorev, G. V. Kovaleva, A. V. Nazarenko


DOI: https://doi.org/10.31111/nsnr/2018.52.1.33


Abstract

New data on morphology of 7 infraspecific taxa of Actinocyclus octonarius, frequently found in the Holocene deposits of the Sea of Azov, are presented. New species A. pseudopodolicus Kovaleva et Gogorev, sp. nov., and variety A. octonarius var. tonsura Kovaleva et Gogorev, var. nov. are described. They are similar to varieties of A. octonarius and some other Actinocyclus species but differ from them in presence of curved fascicules of areolae in A. pseudopodolicus and hyaline ring on valves of A. octonarius var. tonsura.


Key words: Actinocyclus octonarius, Actinocyclus octonarius var. tonsura var. nov., Actinocyclus pseudopodolicus sp. nov., Ancient Azov sediments, Bacillariophyta, diatoms, Holocene, morphology, New Azov sediments, Sea of Azov, sediment core


Section: Algae


How to cite

Gogorev R. M., Kovaleva G. V., Nazarenko A. V. 2018. Actinocyclus pseudopodolicus sp. nov. and infraspecific complex of A. octonarius (Bacillariophyta) from Holocene sediments of the Sea of Azov. Novosti Sist. Nizsh. Rast. 52(1): 33–61. https://doi.org/10.31111/nsnr/2018.52.1.33


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