jawless vertebrate


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jawless vertebrate

[′jȯ·ləs ′vərd·ə·brət]
(vertebrate zoology)
The common name for members of the Agnatha.
References in periodicals archive ?
Today, the only jawless vertebrates are lampreys and hagfishes, whereas jawed vertebrates number more than fifty thousand species, including ourselves.
New Silurian and Devonian fork-tailed 'thelodonts' are jawless vertebrates with stomachs and deep bodies.
Now, an international team of researchers, led by a faculty member from the University of Colorado, has noted that three genes in jawless vertebrates might have been key to the development of jaws in higher vertebrates.
Lampreys are jawless vertebrates (agnathans) and the most primitive representatives of the cyclostome branch from which it is feasible to obtain embryos routinely.
Agassiz (in Murchison 1838) but their status as a distinct group of jawless vertebrates evolved slowly over many decades (see historical review by, e.