-
during the
Cambrian and
Ordovician periods.
Unlike other echinoderms,
ctenocystoids had
bilateral symmetry, or were only very
slightly asymmetrical. They...
-
known echinoderm. It
resembles the
extinct ctenocystoids and cinctans,
particularly the
basal ctenocystoid Courtessolea.
Ctenoimbricata is interpreted...
- have
found cinctans to be stem-group echinoderms,
intermediate between ctenocystoids and solutans. The
internal phylogenetic relationships within cinctans...
-
Mobile echinoderms (stylophorans, homosteleans, homoiosteleans, and
ctenocystoids) were not
significantly affected by the
substrate revolution. Early...
-
Castericystis sp.
Cothurnocystis sp. -
stylophoran Ctenocystis sp. -
ctenocystoid Gogia spiralis -
eocrinoid Eocrinoid holdfasts believed to
belong to...
-
Special Publication 1, 129-141. Dzik, J. & Orłowski, S. 1995.
Primitive ctenocystoid echinoderm from the
earliest Middle Cambrian of Poland.
Annales de Paléontologie...
- last
common ambicularian ancestor.
Later early echinoderms such as the
ctenocystoids lost the
muscular stalk of
these basal echinoderms,
while maintaining...
-
Imran A. Rahman;
Sarah E. Stewart;
Samuel Zamora (2015). "The
youngest ctenocystoids from the
Upper Ordovician of the
United Kingdom and the
evolution of...
