The
four
species
of
musk
deer
make
up
the
family
Moschidae.
They
are
more
primitive
than
the
true
deer
(family
Cervidae)
in
not
having
antlers
or
facial
glands,
in
having
only
a
single
pair
of
teats,
and
in
possessing
a
gall
bladder,
a
caudal
gland,
and—of
particular
economic
importance
to
humans—a
musk
gland.
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