The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
in botany, a class of Pyrophyta; in zoology, an order of protozoans of the class Flagellata (another name for the order Dinoflagellata).
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.