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Holocephali ("complete heads"),
sometimes given the name Euchondrocephali, is a
subclass of
cartilaginous fish in the
class Chondrichthyes. The earliest...
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Edestidae are a
poorly known,
extinct family of shark-like
eugeneodontid holocephalid cartilaginous fish.
Similar to the
related family Helicoprionidae, members...
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suggests that it was
actually a
holocephalid, and not a
placoderm at all. However, if this is true, then the
holocephalids (chimaeras, iniopterygians, petalodonts...
- (synonym Ag****izodontidae) is an extinct,
poorly known family of
bizarre holocephalids within the
poorly understood order Eugeneodontida.
Members of the Helicoprionidae...
- plates, long bodies,
reduced armor, and a
superficial resemblance to
holocephalid fish. The
group is so far the only
Placoderms known with ****ually dimorphic...
