Blastozoa

Blastozoa
blastoids
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Blastozoa
Classes
Class Eocrinoidea (Cambrian - Silurian) Class Parablastoidea (Ordovician) Class Rhombifera = Cystoidea, part (Ordovician - Devonian) Class Diploporita = Cystoidea, part (Ordovician - Devonian) Class Blastoidea (Ordovician - Permian)

Blastozoa is a subphylum of extinct animals belonging to Phylum Echinodermata. This subphylum is characterized by the presence of hydrospires.^[1]

References

External links

• Harvard: Subphylum Blastozoa