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Noun
heterostracan
has 1 sense
heterostracan
- extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
--
1
is a kind of
jawless vertebrate
,
jawless fish
,
agnathan
--
1
is a member of
Heterostraci
,
suborder Heterostraci
,
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