- some
species is entire; in
others it is
divided into two sections: the
epistoma and the clypeus. The
largest antennal segment is the third; in most species...
-
triangle (male) is rugose. The face is rugose,
concave on the
lower part. The
epistoma is but
slightly produced.
There is a
small silvery spot on each side of...
-
biological characteristics (including
differing areas of
setae frequency and
epistoma positioning)
warranted a
reclassification of
certain local varietals of...
-
cheliceral claws. The
first joint of the chelicerae,
where it
connects to the
epistoma (a
plate located on the prosoma, or "head"),
would have been
capable of...
- large, 5 to 20 mm in length.
Scales never sculptured.
Posterior margin of
epistoma never carinate or keeled,
although margin elevated distally in a few species...
- fine
yellowish hairs. The head is
strongly retracted into prothorax,
epistoma is well delimited.
Frontal sutures are distinct,
longitudinal edges are...
- the eyes. The
ocelli were
placed well
forward between the eyes and the
epistoma was well developed. The legs
increased in size gradually, with the first...
- has a
gently concave shape and is
noticeably bumpy below the center. The
epistoma, the area
between the
frons and the mouth, is not prominent. The antennae...
- is four-segmented. The
scapus is
regularly thick. The
frons above the
epistoma is
mostly smooth and alutaceous, with
minor punctures, or may be rugged...
- "Laurieipterines" are
diagnosed as
stylonurids with
broad metastoma and an
epistoma with a
rostral field and were
restricted to the
Early Silurian. Family...
