- A
pedicellaria (pl.:
pedicellariae) is a
small wrench- or claw-shaped
appendage with
movable jaws,
called valves,
commonly found on
echinoderms (phylum...
-
madreporite (the
entrance to the
water vascular system),
pedicellariae and paxillae.
Pedicellariae are
compound ossicles with forceps-like jaws. They remove...
-
globiferous pedicellariae into two
subtypes based on size - the
trumpet pedicellariae and the
giant pedicellariae. The
other two
types of
pedicellariae - tridentate...
- then they
spread apart so that the
pedicellariae can
pinch the intruder. One of the four main
types of
pedicellariae on S.
droebachiensis is
actually poisonous...
- into
numerous finer nerves to
innervate the tube feet, spines, and
pedicellariae. Sea
urchins are
sensitive to touch, light, and chemicals.
There are...
- spines, rods and crosses, and
specialised compound structures including pedicellariae and paxillae.
Plates are
tabular ossicles that fit
neatly together in...
- the
mesodermal ossicles and are
protected from
microscopic larvae by
pedicellariae. In a
living specimen, the
dermal gills can be
extended or withdraw...
-
genera in the
order Forci****tida, are
recognisable externally by
their pedicellariae, many
thousands of tiny jaw-like
structures on the skin
which can snap...
- and a
number of
small pedicellariae. At
intervals down each ray
there are
transverse bands armed with
numerous large pedicellariae. The oral or
lower surface...
-
urchins are venomous. The
toxins are
injected through their spines or
pedicellariae. Chaetognathans,
known as
arrow worms, use the
grasping spines in front...
