Spiraculata is an order of

Blastoid Blastoids (class Blastoidea) are an extinct type of stemmed echinoderm, often referred to as sea buds. They first appear, along with many other echinoderm classes, in the Ordovician period, and reached their greatest diversity in the Mississi ...

s. These blastoids are characterized by indirect entrance to the hydrospires through canals by way of pores.

Genera

*'' Acentrotremites'' *'' Ambolostoma'' *'' Arcuoblastus'' *'' Auloblastus'' *'' Belocrinus'' *'' Calycoblastus'' *'' Carpenteroblastus'' *'' Conuloblastus'' *'' Cordyloblastus'' *'' Costatoblastus'' *'' Cribroblastus'' *'' Cryptoblastus'' *'' Decemoblastus'' *'' Deliablastus'' *''

Deltoblastus ''Deltoblastus'' is a genus of blastoid echinoderms that lived in the Permian. Its fossils are known from Asia. References * ''Fossils'' (Smithsonian Handbooks) by David Ward (Page 190) External links''Deltoblastus''in the Paleobiology Databa ...

'' *'' Dentiblastus'' *'' Devonoblastus,'' *'' Diploblastus'' *'' Doryblastus'' *'' Elaeacrinus'' *'' Eleutherocrinus'' *'' Ellipticoblastus'' *'' Euryoblastus'' *'' Globoblastus'' *'' Gongyloblastus'' *'' Granatocrinus'' *'' Heteroblastus'' *'' Houiblastus'' *'' Iranoblastus'' *'' Kadiskoblastus'' *'' Lophoblastus'' *'' Malchiblastus'' *'' Metablastus'' *'' Monadoblastus'' *'' Monoblastus'' *'' Monoschizablastus'' *'' Montanablastus'' *'' Nodoblastus'' *'' Nucleocrinus'' *'' Orbiblastus'' *'' Orbitremites'' *'' Pentephyllum'' *''

Pentremites ''Pentremites'' is an extinct genus of blastoid echinoderm belonging to the family Pentremitidae. Description These stalked echinoderms averaged a height of about but occasionally ranged up to about 3 times that size. They, like other blastoid ...

'' *'' Pentremoblastus'' *'' Perittoblastus'' *'' Placoblastus'' *'' Poroblastus'' *'' Ptychoblastus'' *'' Pyramiblastus'' *'' Rhopaloblastus'' *'' Schizoblastidae'' *'' Schizoblastus'' *'' Schizotremites'' *'' Sinopetaloblastus'' *'' Strongyloblastus'' *'' Tanablastus'' *'' Tricoelocrinus'' *'' Troosticrinus'' *'' Uyguroblastus'' *'' Xinjiangoblastus'' *'' Xyeleblastus''

References

Blastozoa Prehistoric animal orders Echinoderm orders {{paleo-echinoderm-stub