cyclostomata defined in 1951 yearcyclostomata - cyclostomata;
cyclostomata - (1) Order of class Agnatha. Consists of lampreys and hagfish, the only living representatives of Agnatha (See also: Ostraco-dermi). Eel-like aquatic animals, with jawless sucking mouth, single nostril, no bone or scales, and no paired fins. They attach themselves by their mouths to fish, whose flesh they rasp with horny tongue, sucking the blood. (2) Sub-order of Polyzoa.
near cyclostomata in Knolik
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