Meaning | eel-shaped vertebrate without jaws / jaws or paired appendages including the cyclostomes and some extinct forms. |
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Synonyms | jawless fish, agnathan |
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Member of | Agnatha, superclass Agnatha | superclass of eel-shaped chordates lacking jaws / jaws and pelvic fins |
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Narrower | anaspid | Extinct small freshwater jawless fish usually having a heterocercal tail and an armored head |
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conodont | small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone |
cyclostome | Primitive aquatic vertebrate |
hagfish, hag, slime eels | eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles |
heterostracan | Extinct jawless fish with the anterior part of the body covered with bony plates |
lamprey, lamprey eel, lamper eel | Primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue |
osteostracan, cephalaspid | Extinct jawless fish of the Devonian with armored head |
ostracoderm | Extinct fish-like jawless vertebrate having a heavily armored body |
Broader | aquatic vertebrate | animal living wholly or chiefly in or on water |
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Spanish | agnato |
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Catalan | àgnat |
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