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Pikaia gracilens is an extinct,
primitive chordate animal known from the
Middle Cambrian Burgess Shale of
British Columbia.
Described in 1911 by Charles...
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Pikaia! (ピカイア!) is a ****anese
educational anime series produced by NHK Educational. The
first season started airing on
April 29, 2015 for 13
episodes before...
- and Myllokunmingia, also from the
Chengjiang fauna, are
regarded as fish.
Pikaia,
discovered much
earlier (1911) but from the Mid
Cambrian Burgess Shale...
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between 538 and 485
million years ago. The
first Cambrian chordate known is
Pikaia gracilens, a lancelet-like
animal from the
Burgess Shale in
British Columbia...
- from the
Chengjiang biota, are the
earliest bodyfossils of fish,
whereas Pikaia,
discovered much
earlier but from the Mid
Cambrian Burgess Shale, is now...
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Although some
paleontologists regarded it as an
early chordate allied with
Pikaia et al.,
Conway Morris suggested in 1993 that it
might be a
Cambrian descendant...
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gnathostomatans a
little more confusing, as it was
roughly contemporary with
Pikaia. As
Pikaia did not have gill bars,
unlike Branchiostoma,
there are two possible...
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Evolution of fish Fish
Timeline of fish
evolution Forerunners Basal member †
Pikaia Cephalochordate †Cathaymyrus
Lancelet Olfactores †Haikouella
Tunicate †Myllokunmingiidae...
- stem-chordates,
lying outside a
clade formed by Yunnanozoon, Cathaymyrus,
Pikaia and crown-chordates. From
their superficially tadpole-like forms, leaf or...
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similar morphology Ostracoderm Arandaspis Other basal Cambrian chordates:
Pikaia –
Cambrian chordate Myllokunmingia –
close relative Zhongjianichthys – eel-like...
