Algologia 2009, 19(1): 3–10
Morphology, Anatomy, Cytology
Morphological variability of several species of the genus Aulacoseira Thw. (Bacillariophyta)
Genkal S.I.1, Kharitonov V.G.2- 1I.D. Papanin Institute of Biology of Inland Waters, Russian Academy of Sciences,
- Settle of Boroc, Nekouzskiy District, 152742 Yaroslavl Region, Russia
- 2Institute of Biological Problems of North, Far East Branch of Russian Academy of Sciences,
- 16, Portovaya St., 68500, Magadan
Abstract
Electron microscopic studies of material from Lake Elgygytgyn (Chukotka, Russia) and water bodies of its basin have showed that centric diatoms of the genus Aulacoseira Thw. (A. distans var. septentrionalis Camb. et Charl. and A. perglabra (Östr.) Haw. emend. Genkal et Kharitonov) manifest significant variability of morphological features (valve diameter, height of the mantle, number of row and areolae in 10 µm, number of spines in 10 µm, and location of areolae on the valve face). A broadened diagnosis of A. perglabra is presented.
Keywords: Bacillariophyta, Centrophyceae, Aulacoseira, morphology, Lake Elgygytgyn
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