Last Updated：2022/12/24
As such, Megalograptus has been considered to represent the plesiomorphic condition within eurypterids for a number of characters, including the occurrence of the opisthosomal preabdominal/postabdominal constriction at the sixth and seventh segment as opposed to the seventh and eighth [ 5 ], the possession of an extra podomere on prosomal appendages II–V [ 72 ], and the morphology of the prosomal ventral plates [ 37 ].
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As
such,
Megalograptus
has
been
considered
to
represent
the
plesiomorphic
condition
within
eurypterids
for
a
number
of
characters,
including
the
occurrence
of
the
opisthosomal
preabdominal/postabdominal
constriction
at
the
sixth
and
seventh
segment
as
opposed
to
the
seventh
and
eighth
[
5
],
the
possession
of
an
extra
podomere
on
prosomal
appendages
II–V
[
72
],
and
the
morphology
of
the
prosomal
ventral
plates
[
37
].
