%0 Journal Article %A Khursevich, G. K. %A Fedenya, S. A. %D 2006 %I Begell House %N 2 %P 200-210 %R 10.1615/InterJAlgae.v8.i2.70 %T Morphology of new freshwater species of the genus Actinocyclus Ehrenberg (Bacillariophyta) from the Upper Miocene sediments of Lake Baikal, Siberia %U https://www.dl.begellhouse.com/journals/7dd4467e7de5b7ef,047857c86d61989b,5d228de025e607f6.html %V 8 %X Four new species of the genus Actinocyclus Ehrenberg, studied in light (LM) and scanning electron microscope (SEM), are described from the Upper Miocene sediments of the BDP-98 drill core, Lake Baikal. They are distinguished by the different structure of rimoportulae, different forms of spines, and the density of their placement on the valve face/mantle junction. The morphological peculiarities of known fossil freshwater species of Actinocyclus krasskei are marked. %8 2006-09-27