as two before, belonging to
fishes.Elasmobranch
and bony fish from fossil records began, is the development on two
lanes, until ***3, when the new materials will be promoted to two
separate the two classes, namely chondrichthyes and
osteichthyes. Fishes is one of the biggest extant
vertebrate subphylum classes, from the perspective of animal
evolution, the outline is the beginning of a jawed, it was for the
most primitive, the oldest jawed
steel.This
is the biggest of the vertebrate subphylum classified groups, in
the edge of the devonian has derived a lot of branch, development
and evolution has become a fish of various kinds of complicated
shape.Fish
is divided into existing elasmobranch (classes) and bony fish
(class). The main
characteristics *
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hong****6
