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Antiarchi ("opposite ****") is an
order of
heavily armored placoderms. The
antiarchs form the second-most
successful group of
placoderms after the arthrodires...
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forward his
theories on evolution.[citation needed] As with all
other antiarchs,
Pterichthyodes had
heavily armored heads and forebodies,
while their...
- as
antiarchs and arthrodires. However,
through comparisons of
skull anatomies,
rhenanids are now
considered to be the
sister group of the
antiarchs. When...
- The
earliest members of
Bothriolepis appear by the
Middle Devonian.
Antiarchs, as well as
other placoderms, are
morphologically diverse and are characterized...
- is a
suborder of
antiarch placoderm fishes. The
group is
considered paraphyletic. The
cladogram is
taken from
Bothriolepid antiarchs (Vertebrata, Placodermi)...
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possessed two
pairs of
paired fins.
Until recently these ancestors,
known as
antiarchs, were
thought to have
lacked pectoral or
pelvic fins. In
addition to this...
- tubercles, in a
pattern similar to that of M. sinensis. A
genus of very
small antiarchs,
originally described from M. ****i, of
Upper Givetian strata of Scotland...
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Bothriolepididae is a
family of
antiarch placoderms,
known from the Emsian, to Famennian. The
cladogram is from "Bothriolepid
antiarchs (Vertebrata, Placodermi)...
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Onychodus from the
Middle Devonian of
Wisconsin Bothriolepis, a
diverse antiarch genus that
lived from the Mid to Late Devonian. Shark-like Cladoselache...
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Microbrachius is an
extinct genus of tiny,
advanced antiarch placoderms closely related to the bothriolepids.
Specimens range in age from the
Lower Devonian...
