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Algae > Volume 25(2); 2010 > Article
Algae 2010;25(2): 57-64. doi: https://doi.org/10.4490/algae.2010.25.2.057
Morphological description of Cyclotella atomus var. marina(Bacillariophyceae): newly reported in Korean waters
Mi Hee Chung1, Won Duk Yoon1, Joon-Baek Lee2*

1National Fisheries Research and Development Institute, Busan 619-705, Korea,
2Department of Earth and Marine Sciences, Marine and Environmental Research Institute, Jeju National University, Jeju
A variety of Cyclotella atomus were discovered among the epiphytic diatoms on eelgrass (Zostera marina L.) in Korean waters. Cyclotella atomus var. marina has a flat and disc-shaped valve, and is clearly differentiated into a striate marginal zone and a smooth central zone. The valves have a very small diameter ranging from 3.1-3.4 μm. This small diatom does not have any central ornamentation. The marginal striate zone has numerous granules toward the mantle. The valves have five or six marginal fultoportulae with two satellite pores and a single marginal rimoportula.
Key words: Cyclotella; Cyclotella atomus var. marina; diatom; eelgrass; epiphytic

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