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Holocephali ("complete heads"),
sometimes given the term Euchondrocephali, is a
subclass of
cartilaginous fish in the
class Chondrichthyes. The earliest...
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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...
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Parahelicoprion is an
extinct genus of shark-like
eugeneodontid holocephalids from the
Permian of the Ural
Mountains (Russia) and
Copacabana Formation...
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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...
- (synonym Ag****izodontidae) is an extinct,
poorly known family of
bizarre holocephalids within the
poorly understood order Eugeneodontida.
Members of the Helicoprionidae...
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Venustodus is an
extinct genus of
eugeneodontid holocephalid from the
Carboniferous of the Komi
Republic of Russia, and in
similarly aged
strata in the...
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Cobelodus is an
extinct genus of
holocephalid known from the late
Carboniferous to the
early Permian period. The type specimen, ****igned to the
genus Styptobasis...
- the
Ancient Gr****, "flesh saw") is an
extinct genus of
eugeneodontid holocephalids from the
Permian of Greenland.
Similar to
other eugeneodontids such...
- plates, long bodies,
reduced armor, and a
superficial resemblance to
holocephalid fish. The
group is so far the only
Placoderms known with ****ually dimorphic...
