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Additional
Agnatha
English Wikipedia - The Free Encyclopedia
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Agnatha
Agnatha
(
Greek
, "no jaws") is a
superclass
of jawless fish in the
phylum
Chordata
, subphylum
Vertebrata
, consisting of both present (
cyclostomes
) and extinct (
conodonts
and
ostracoderms
) species. The group excludes all vertebrates with jaws, known as
gnathostomes
.
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