Echinoderms

Echinoderms are marine animals composed of a dermal skeleton with a characteristic pentaradial symmetry. Crinoids are one group of echinoderms and are listed on a previous web page. Other echinoderms include starfish, echinoids, cystoids, edrioasteroids, blastoids, paracrinoids and eocrinoids. Most of the echinoderems pictured here are from the Ordovician Bobcaygeon/Verulam Formations of Ontario. There are a few from other localities.


All photographs on these web pages are not to be copied or used for any purpose without my written permission.

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Ordovician Echinoderms from Ontario

Amecystis
Amecystis
Anthroosasterias
Anthroosasterias
Foerstediscus
Foerstediscus
Amecystis
Amecystis
Anthroosasterias
Anthroosasterias
Foerstediscus
Foerstediscus
Belochthus
Edrioaster
Stenaster
Stenaster
Edriophus
Amygdalocystites
Belochthus
Edrioaster
Stenaster
Stenaster
Edriophus
Amygdalocystites
Glyptocystites
Glyptocystites
Isorophusella
Cyclocystoides
Astrocystites
Tarquinites
Glyptocystites
Glyptocystites
Isorophusella
Cyclocystoides
Astrocystites
Tarquinites
Pleurocystites
Pleurocystites
Ateleocystites
Thresherodiscus
Astroporites
Belemnocystites
Pleurocystites
Pleurocystites
Ateleocystites
Thresherodiscus
Astroporites
Belemnocystites
Amecystites
Foerstediscus
Edriophus
Edrioaster
Isorophusella
Thresherodiscus
Amecystis
Foerstediscus
Edriophus
Edrioaster
Isorophusella
Thresherodiscus
Homocystites
Ateleocystites
Glyptocystites
Stenaster
Amygdalocystites
Isorophusella
Homocystites
Ateleocystites
Glyptocystites
Stenaster
Amygdalocystites
Isorophusella
Protaster
Zygocycloides
Anthroosasterias
Comarocystites
Edrioaster
Belochthus
Protaster
Zygocycloides
Anthroosasterias
Comarocystites
Edrioaster
Belochthus
Comarocystites
Schuchertia
Cyclocystoides
Protaster
Astrocystites
Thresherodiscus
Comarocystites
Schuchertia
n. gen. n.sp.
Protaster
Astrocystites
Thresherodiscus
Sertulaster
Sertulaster
more to come
more to come
more to come
more to come
Sertulaster
Sertulaster
n. gen. n.sp.
more to come
more to come
more to come



Echinoderms from Other localities
Pentremites
Pentremites
Caryocystites
Gogia
Hyperoblastus
Carneyella
Pentremites
Pentremites
Caryocystites
Gogia
Hyperoblastus
Carneyella
Devonaster
Eugasterella
Eospondylus
Urasterella
Pentremites
Dexterites
Devonaster
Eugasterella
Eospondylus
Urasterella
Pentremites
Dexterites
Archaeocidaris
Orophocrinus
Placoblastus
Pyramiblastus
Castericystis
Gogia
Archaeocidaris
Orophocrinus
Placoblastus
Pyramiblastus
Castericystis
Gogia
Hypsiclavus
Caryocrinites
Pentremites
Troosticrinus
Archaeocidaris
Rhenocystis
Hypsiclavus
Caryocrinites
Pentremites
Troosticrinus
Archaeocidaris
Rhenocystis
Eleutherocrinus
Nucleocrinus
Hyperoblastus
Pentremites
Geocoma
Amber
Eleutherocrinus
Nucleocrinus
Hyperoblastus
Pentremites
Geocoma
Amber
Protaster
Protopaleaster
Protaster
Spinodiscus
Nucleocrinus
Deltablastus
Protaster
Protopaleaster
Protaster
Spinadiscus
Nucleocrinus
Deltablastus
Globoblastus
Metablastus
Heteroschisma
Troosticrinus
Caryocystites
Hyperoblastus
Globoblastus
Metablastus
Heteroschisma
Troosticrinus
Caryocystites
Hyperoblastus
Cheirocystis
Calocystites
Caryocystites
Devonaster
Adocetocystis
Cardiocystites
Cheirocystis
Calocystites
Caryocystites
Devonaster
Adocetocystis
Cardiocystites
Deltablastus
Loriolaster
Agelacrinites
Praeaplocoma
Krama
Tyrridiocystis
Deltablastus
Loriolaster
Agelacrinites
Praeaplocoma
Krama
Tyrridiocystis
n. gen., n. sp.
Cholaster
Paulicystis
Protaster
Holocystites
Triamara
n. gen., n. sp.
Cholaster
Paulicystis
Protaster
Holocystites
Triamara
Caryocrinites
Lepidesthes
Paulicystis
Protaster
Holocystites
Triamara
Caryocrinites
Lepidesthes
more to come
more to come
more to come
more to come




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