cyclostome

[ sahy-kluh-stohm, sik-luh- ]

Phonetic (Standard)IPA

adjective

belonging or pertaining to the Cyclostomata, a subclass of jawless, eellike, marine vertebrates of the class Agnatha, comprising the lampreys and hagfishes.
having a circular mouth.

cyclostome

/ saɪˈklɒstəmɪt; ˈsɪk-; ˌsɪk-; ˌsaɪkləʊˈstɒmətəs; ˈsaɪkləˌstəʊm; -ˈstəʊmə-; -ˌmeɪt /

any primitive aquatic jawless vertebrate of the class Cyclostomata, such as the lamprey and hagfish, having a round sucking mouth and pouchlike gills

cyclostome

/ sī′klə-stōm′ /

Any of various jawless fish of the order Cyclostomata, having a long, eellike body without scales, a cartilaginous skeleton, and a disklike mouth used for sucking juices from prey. Cyclostomes include the hagfish and lampreys, although some scientists classify these two groups as separate orders.

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First recorded in 1825–35; cyclo- + -stome

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In the amphioxus, as has been said, the cranio-spinal axis alone exists; the Cyclostome fishes are but a step higher.

The cyclostome fishes have, so far, been discovered only in Scotland, in the tiny Palaeospondylus.

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