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Acanthodii or
acanthodians is an
extinct class of
gnathostomes (jawed fishes). They are
currently considered to
represent a
paraphyletic grade of various...
- This list of
acanthodian genera is an
attempt to
create a
comprehensive listing of all
genera that have ever been
included in the
subclass Acanthodii...
-
considered to have
evolved from
acanthodians. The
discovery of
Entelognathus and
several examinations of
acanthodian characteristics indicate that bony...
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cartilaginous fishes, as well as
extinct prehistoric fish such as
placoderms and
acanthodians. Most
gnathostomes have
retained ancestral traits like true teeth, a...
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Nerepisacanthus is an
extinct genus of
acanthodian,
probably acritolepid, from
Middle Silurian (?late
Llandovery (Telychian) to
Ludlow stages) deposits...
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supposedly includes the tetrapods, bony fish, and the
wholly extinct acanthodian fish. Key
characters of this
group include an
operculum and a single...
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Xylacanthus is a
genus of
extinct acanthodian fish
belonging to the
family Ischnacanthidae. It
lived during the
Silurian to
Devonian periods.
Three species...
- as Diplacanthida, Diplacanthoidei, or Diplacanthini) is an
order of "
acanthodian" stem-chondrichthyans
which lived during the
Devonian Period. incertae...
- ἄκανθώδης akanthódis, 'provided with spines') is an
extinct genus of
acanthodian fish.
Species have been
found in Europe,
North America, and Asia, spanning...
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Parexus is an
extinct genus of
acanthodian fish.
Acanthodians are
often referred to as ‘spiny sharks’,
although acanthodians are not true
sharks and evolved...
