- it is
possible to find
apical actines with
vestigial spines.
Tripods are typical, with a
raised centre and
conical actines but
sometimes they are only similar...
- in 3-4 rows.
These spines are
directed toward the tip of the
actine. Some
apical actines,
particularly those of
young ****ules, have only
vestigial spines...
-
other and
radiate equally.
Actines are conical,
slightly undulated at the
distal part, and with a
sharp tip. The
apical actine of the
tetractines is shorter...
- long
unpaired actine and
short paired actines.
Irregular diactines of
variable sizes are
present at low
numbers in the peduncle. All
actines are cylindrical...
-
without organisation:
Triactine I:
regular (equiangular and equiradiate);
actines are
slightly conical to conical,
straight and
blunt at the tip. Triactine...
- are less
abundant than triactines.
Their apical actine is
almost the same
thickness as the
other actines. It is conical, sharp, shorter,
straight and smooth...
-
tetractines are
equiradiate and equiangular, with
conical actines and
blunt tips. The
apical actine of the
tetractines is
shorter and
thinner than the facial...
-
exterior delimiting the cormus. The
actines of the
triactines and
tetractines are conical, with
sharp tips. The
apical actine of the
tetractines is shorter...
- with
three curved actines (rays)
radiating perpendicular to a
straight basal actine.
These ****ules may be
linked by
their basal actines or
cemented together...
- equiradiate) and are the same size. The
actines are 7–10
times longer than they are thick, with
slender tapers. The
apical actines of the
tetractines are straight...
