Skip to main content
    • Aa
    • Aa

Llandovery (early Silurian) crinoids from Hiiumaa Island, western Estonia

  • William I. Ausich (a1) and Mark A. Wilson (a2)

Rhuddanian crinoid faunas are poorly known globally, making this new fauna from the Hilliste Formation of western Estonian especially significant. The Hilliste fauna is the oldest Silurian fauna known from the Baltica paleocontinent, thus this is the first example of the crinoid recovery fauna after the Late Ordovician mass extinction. Hiiumaacrinus vinni n. gen. n. sp., Protaxocrinus estoniensis n. sp., Eomyelodactylus sp., calceocrinids, and five holdfast types are reported here. Although the fauna has relatively few taxa, it is among the most diverse Rhuddanian faunas known. Similar to other Rhuddanian crinoid faunas elsewhere, the Hilliste crinoid fauna contains crinoids belonging the Dimerocrinitidae, Taxocrinidae, Calceocrinidae, and Myelodactylidae; most elements of the new fauna are quite small, perhaps indicative of the Lilliput Effect.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

J. Alroy , 2008, Dynamics of extinction and origination rates in the fossil record: Proceedings of the National Academy of Sciences, v. 105, p. 1153611542.

J. Alroy , 2010a, The shifting balance of diversity among major marine animal groups: Science, v. 329, p. 11911194.

J. Alroy , 2010b, Geographic, environmental and intrinsic biotic controls on Phanerozoic marine diversifications: Palaeontology, v. 53, p. 12111235.

W.I. Ausich , 1998b, Early phylogeny and subclass division of the Crinoidea (phylum Echinodermata): Journal of Paleontology, v. 72, p. 499510.

W.I. Ausich , M.A. Wilson , and O. Vinn , 2012, Crinoids from the Silurian of Western Estonia (Phylum Echinodermata): Acta Palaeontologica Polonica, v. 57, p. 613631.

M.R. Borths , and W.I. Ausich , 2011, Ordovician-Silurian Lilliput crinoids during the end-Ordovician biotic crisis: Swiss Journal of Paleontology, v. 130, p. 718.

C.E. Brett , 1981, Terminology and functional morphology of attachment structures in pelmatozoan echinoderms: Lethaia, v. 14, p. 343370.

P. Copper , 2001, Reefs during the multiple crises towards the Ordovician–Silurian boundary: Anticosti Island, eastern Canada, and worldwide: Canadian Journal of Earth Sciences, v. 38, p. 153171.

A. Delabroye , A. Munnecke , M. Vecoli , P. Copper , N. Tribovillard , M. Joachimski , A. Desrochers , and T. Servais , 2011, Phytoplankton dynamics across the Ordovician/Silurian boundary at low palaeolatitudes: correlations with carbon isotopic and glacial events: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 312, p. 7997.

S.K. Donovan , 1987, Functional morphology of an unusual pelmatozoan column from the Ashgill Boda Limestone, Sweden: Geologiska Föreningens i Stockholm Förhandlingar, v. 109, p. 255257.

D.A. Harper , E.U. Hammarlund , and C.M. Rasmussen , 2014, End Ordovician extinctions: a coincidence of causes: Gondwana Research, v. 25, p. 12941307.

Y. Mao , J.-P. Lin , and W.I. Ausich , 2015, Chinese origin and radiation of the Palaeozoic crinoid family Petalocrinidae: Palaeoworld, v. 24, p. 445453.

S.E. Peters , and W.I. Ausich , 2008, A sampling-adjusted macroevolutionary history for Ordovician-Silurian crinoids: Paleobiology, v. 34, p. 104116.

F. Springer , 1906, Discovery of the disk of Onychocrinus and further remarks on the Crinoidea Flexibilia: Journal of Geology, v. 14, p. 467523.

A. Urbanek , 1993, Biotic crises in the history of Upper Silurian graptoloids: a paleobiological model: Historical Biology, v. 7, p. 2950.

J.-P Zonneveld , and M.K. Gingras , 2014, Sedilichnus, Oichnus, Fossichnus, and Tremichnus: ‘small round holes in shells’ revisited: Journal of Paleontology, v. 88, p. 895950.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
  • URL: /core/journals/journal-of-paleontology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Altmetric attention score

Full text views

Total number of HTML views: 8
Total number of PDF views: 27 *
Loading metrics...

Abstract views

Total abstract views: 453 *
Loading metrics...

* Views captured on Cambridge Core between 9th September 2016 - 22nd July 2017. This data will be updated every 24 hours.