-
Paracrinoidea is an
extinct class of
blastozoan echinoderms. They
lived in
shallow seas
during the
Early Ordovician through the
Early Silurian. While...
-
currently contained within Crinozoa include Crinoidea and the
extinct Paracrinoidea (Cystoidea, Edrioasteroidea, and Rhombifera).
Since the Paleozoic, sea...
-
Ophiocistioidea †
Helicoplacoidea †
Blastozoa †
Blastoidea †
Cystoidea † von Buch, 1846
Eocrinoidea †Jaekel, 1899
Paracrinoidea † Regnéll, 1945 †=Extinct...
- Rhombifera, Diploporita, Coronoidea, Blastoidea, Parablastoidea, and
Paracrinoidea. They may also be the
progenitors of the cystoids, who are believed...
-
Rhombifera (Ordovician - Devonian)
class Diploporita (Ordovician - Devonian)
class Blastoidea (Ordovician - Permian)
class Paracrinoidea (Ordovician-Silurian)...
- This List of
echinoderm orders concerns the
various classes and
orders into
which taxonomists categorize the
roughly 7000
extant species as well as the...
- †Simonkovicrinida -
single genus †Simonkovicrinus
order †Ascocystitida
class †
Paracrinoidea -
traditionally within the
Crinozoa (or less
commonly within the Blastozoa...
