-
polar axis, they are
biradiate (with two
planes of symmetry) or
pluriradiate (with more than two
planes of symmetry).
Biradiate individuals have long...
-
Depending on the number, the
vanes display pentaradiate,
tetra radiate, or
biradiate symmetries. The
vanes give C. lyra its harp-like
structure and
these are...
- the two
genera being the
number of
planes of symmetry:
Arthrodesmus was
biradiate (having two
planes of symmetry),
while Staurastrum included species with...
- (Rhabdinopora, Staurograptus),
triradiate (Anisograptus, Triograptus), or
biradiate (Adelograptus, Kiaerograptus). List of
genera from
Maletz (2014): †Adelograptus...
