- (male). In males, the
ninth abdominal segment is
divided into a
dorsal '
tegumen' and
ventral 'vinculum'. They form a ring-like
structure for the attachment...
-
mouth and **** are located. The body disk that is
covered with a
leathery tegumen containing calcareous plates (in
crinoids and
ophiuroids the main part...
- genitalia:
resembling Celestica but
uncus bilobate and
strongly sclerotized.
Tegumen very
narrow dorsally,
valvae tripartite into
various shaped lobes of a...
- structure, uncus, is
crescent shaped. Its
subunci are long and curved, and the
tegumen has a
convex proximal edge. The
ninth ventral segment, or the vinculum...
-
truncates at the end. The
vinculum is broad, with a
large slender saccus; the
tegumen is elongated. The
anellus is
generally not
sclerotized (hardened), and...
- its 9th
ventral segment, or the vinculum, is
markedly narrower than the
tegumen, and
contains a
pronounced median suture. Both of
these structures are...
- from B.
ephelus by
their larger, H-shaped
gnathos (a
dorsal flap of the
tegumen positioned within the
genital ring), with two
longer lobes bridged by a...
-
characterized by the male
genitalia with a bridge-like
structure connecting the
tegumen and the valva, and the
uncus almost always is
vestigial with two lobes...
-
large tegumen, with its
distal edge
slightly convex when flattened,
while the
subunci are
short and
exhibit bulging at
their bases. The
tegumen extends...
-
covered in
bristles and ends in a
small tube; it is a bit
longer than the
tegumen which in turn is
about as wide as it is long. The
vinculum is
almost quadratic...
