-
tubes are the
apical actines of the
tetractines. ****ules are
equiangular and
equiradiate triactines,
tetractines, and tripods.
Triactines are the most...
-
comprises three kinds of ****ule: triactines,
tetractines and tripods. The
triactines and
tetractines are
equiradiate and equiangular, with
conical actines...
- and
tetractines on the tubes’ interior, and
tripods and
tetrapods on the
exterior delimiting the cormus. The
actines of the
triactines and
tetractines are...
- two-tipped diactines,
triactines with
three ****ules rays, and four-ra****
tetractines.
Specialized cells, the sclerocytes,
produce these ****ules, and only...
-
skeleton consists of a
tangential layer of
triactines and
another of
tetractines. This
species can be
distinguished from the
rather similar Sycon raph****...
-
Large triactines and a few
large tetractines occur in the choanosome.
Approximately a
third of the
small tetractines have
three rows of
spines along the...
- Calcarea. They are
Calcarea with the
triactines and the
basal system of
tetractines sagittal (i.e. the rays of the ****ule make
unequal angles with each...
-
restricted to a sieve-like ostia-bearing region. Dagger-shaped
small tetractines (pugioles) are
frequently the sole
skeleton of the
exhalant aquiferous...
-
contains regular (equiangular and equiradiate)
triactines and
tetractines. However,
tetractines are more rare.
Diactines may be added.
Asconoid aquiferous...
- and the
consistency soft. The
skeleton consists of both
triactines and
tetractines. This
species closely resembles Sycon ciliatum but can be distinguished...
