† Paracrinoidea


Additional Functions


Belong­ing to

Gaeabionta  ⇒ Domäne: Eukaryota  ⇒ Reich: Animalia  ⇒ Mittelreich: Eumetazoa  ⇒ Klade: Triploblastica  ⇒ Klade: Nephrozoa  ⇒ Abzweig: Deuterostomia  ⇒ Klade: Ambulacraria  ⇒ Stamm: Echinodermata  ⇒ Unterstamm: Blastozoa

Taxo­nomic seg­ment


This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.

Name from

Corre­spond­ing author (Name, Year)

Regnell, 1945

Other languages



Lebenszeitraum in Million Jahren (Ma)

Start age: 460.9 Ma - End age: 449.5 Ma
Upper Ordovician
(Oberes Ordovizium)

Additional data by PBDB, License: CC BY

Motility: stationary
Habit: epifaunal
Environment: marine

suspension feeder

Compositon of the remains:

high Mg Calcite

Reference- and Source indication, Literature

Automatic Links to external internet sources (Responsibility is with the operator)

Search for taxonomy at PaleobioDB.org
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Search for taxonomy at The Taxonomicon

Next lower taxonomy level

On the same taxonomic level (siblings) (Count: 5)

Taxonomic assignment (44)

References by PBDB, License: CC BY

  • J. J. Sepkoski, Jr., 2002 - A compendium of fossil marine animal genera - Bulletins of American Paleontology (363), 1-560 (serial monograph, English)
  • A. B. Smith, 1984 - Classification of the Echinodermata - Palaeontology (27), 431-460 (journal article, English)
  • R. L. Parsley, 1981 - Echinoderms from Middle and Upper Ordovician rocks of Kentucky - United States Geological Survey Professional Paper (1066-K), 1-9 (serial monograph, English)
  • T. J. Frest, 1979 - Paracrinoids (Platycystitidae) from the Benbolt Formation (Blackriverian) of Virginia - Journal of Paleontology (53), 380-398 (journal article, English)
  • R. L. Parsley, 1975 - North American Paracrinoidea: (Ordovician: Paracrinozoa, new: Echinodermata) - Bulletins of American Paleontology (68), 1-115 (serial monograph, English)
  • R. V. Kesling, 1968 - Cystoids - Treatise on Invertebrate Paleontology, Part S. Echinodermata 1 (), S85-S267 (book chapter, English)
  • H. L. Strimple, 1952 - Two new species of Sinclairocystis - Journal of the Washington Academy of Sciences (42), 158-160 (journal article, English)
  • R. S. Bassler, 1950 - New genera of American Middle Ordovician "Cystoidea" - Journal of the Washington Academy of Sciences (40), 273-277 (journal article, )
  • A. E. Wilson, 1946 - Echinodermata of the Ottawa Formation of the Ottawa-St. Lawrence lowland - Geological Survey of Canada Bulletin (4), 1-61 (journal article, English)
  • A. F. Foerste, 1920 - Racine and Cedarville cystids and blastoids with notes on other echinoderms - Ohio Journal of Science (21), 1-78 (journal article, English)
  • G. H. Hudson, 1911 - Studies of some Early Siluric Pelmatozoa - New York State Museum Bulletin (149), 195-272 (journal article, English)
  • S. A. Miller, 1889 - - North American geology and palaeontology for the use of amateurs, students and scientists (), 1-664 (book, English)
  • W. R. Billings, 1883 - Notes on, and description of, some fossils from the Trenton Limestone - Ottawa Field Naturalists' Club Transactionsv. 4 (), 49-52 (book/book chapter, English)
  • F. B. Meek, 1865 - Descriptions of new species of crinoidea, etc. from the Paleozoic rocks of Illinois and some of the adjoining states - Proceedings of the Academy of Natural Sciences of Philadelphia (17), 143-155 (journal article, English)
  • E. Billings, 1858 - On the Cystideae of the Lower Silurian rocks of Canada - Geological Survey of Canada Decade (3), 9-74 (journal article, English)