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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.



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Alroy, J., 2008, Dynamics of extinction and origination rates in the fossil record: Proceedings of the National Academy of Sciences, v. 105, p. 1153611542.
Alroy, J., 2010a, The shifting balance of diversity among major marine animal groups: Science, v. 329, p. 11911194.
Alroy, J., 2010b, Geographic, environmental and intrinsic biotic controls on Phanerozoic marine diversifications: Palaeontology, v. 53, p. 12111235.
Angelin, N.P., 1878, Iconographia Crinoideorum: in stratis Sueciae Siluricis fossilium: Samson and Wallin, Holmiae, 62 p.
Ausich, W.I., 1998a, Phylogeny of Arenig to Caradoc Crinoids (Phylum Echinodermata) and suprageneric classification of the Crinoidea: University of Kansas Paleontological Contributions Papers, New Series, no. 9, 36 p.
Ausich, W.I., 1998b, Early phylogeny and subclass division of the Crinoidea (phylum Echinodermata): Journal of Paleontology, v. 72, p. 499510.
Ausich, W.I., and Copper, P., 2010, The Crinoidea of Anticosti Island, Québec (Late Ordovician to early Silurian): Palaeontographica Canadiana, v. 29, 157 p.
Ausich, W.I., and Deline, B., 2012, Macroevolutionary transition in crinoids following the Late Ordovician extinction event (Ordovician to early Silurian): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 361–362, p. 3848.
Ausich, W.I., Kammer, T.W., and Baumiller, T.K., 1994, Demise of the Middle Paleozoic crinoid fauna: a single extinction event or rapid faunal turnover?: Paleobiology, v. 20, p. 345361.
Ausich, W.I., Wilson, M.A., and Vinn, O., 2012, Crinoids from the Silurian of Western Estonia (Phylum Echinodermata): Acta Palaeontologica Polonica, v. 57, p. 613631.
Ausich, W.I., Wilson, M.A., and Vinn, O., 2015, Wenlock and Pridoli (Silurian) crinoids from Saaremaa, western Estonia (Phylum Echinodermata): Journal of Paleontology, v. 89, p. 7281.
Baumiller, T.K., 1994, Patterns of dominance and extinction in the record of Paleozoic crinoids, in David, B., Guille, A., Féral, J.P., and Roux, M., eds. Echinoderms Through Time (Echinoderms Dijon): Rotterdam, A.A. Balkema, p. 193198.
Bengtson, P., 1988, Open nomenclature: Palaeontology, v. 31, p. 223227.
Borths, M.R., and Ausich, W.I., 2011, Ordovician-Silurian Lilliput crinoids during the end-Ordovician biotic crisis: Swiss Journal of Paleontology, v. 130, p. 718.
Brett, C.E., 1981, Terminology and functional morphology of attachment structures in pelmatozoan echinoderms: Lethaia, v. 14, p. 343370.
Copper, P., 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.
Copper, P., 2006, Faunal change across the Ordovician-Silurian mass extinction boundary on Anticosti Island, E Canada: Geological Society of America, Abstracts with Programs, v. 38, p. 403.
Delabroye, A., Munnecke, A., Vecoli, M., Copper, P., Tribovillard, N., Joachimski, M., Desrochers, A., and Servais, T., 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.
Donovan, S.K., 1986, A new genus of inadunate crinoid with unique stem morphology from the Ashgill of Sweden: Palaeontology, v. 29, p. 235242.
Donovan, S.K., 1987, Functional morphology of an unusual pelmatozoan column from the Ashgill Boda Limestone, Sweden: Geologiska Föreningens i Stockholm Förhandlingar, v. 109, p. 255257.
Donovan, S.K., and Franzén-Bengtson, C., 1988, Myelodactylid crinoid columnals from the Lower Visby Beds (Llandoverian) of Gotland: Geologiska Föreningens i Stockholm Förhandlingar, v. 110, p. 6979.
Donovan, S.K., and Pickerill, R., 2016, The invalidity of the trace fossil Tremichnus Brett: Geological Journal, DOI: 10.1002/gj.2849.
Foerste, A.F., 1919, Echinodermata of the Brassfield (Silurian) Formation of Ohio: Bulletin of the Scientific Laboratory Denison University, v. 19, p. 332.
Harper, D.A., Hammarlund, E.U., and Rasmussen, C.M., 2014, End Ordovician extinctions: a coincidence of causes: Gondwana Research, v. 25, p. 12941307.
Hints, O., Ainsaar, L., Männik, P., and Meidla, T., eds., 2008, The Seventh Baltic Stratigraphical Conference: Abstracts and Field Guide, Geological Society of Estonia, 46 p.
Jobson, L.M., 1983, Crinoids and coronoids from the Ordovician of Sweden [M.S. thesis]: University of Liverpool, England.
Mao, Y., Lin, J.-P., and Ausich, W.I., 2015, Chinese origin and radiation of the Palaeozoic crinoid family Petalocrinidae: Palaeoworld, v. 24, p. 445453.
Meek, F.B., and Worthen, A.H., 1869, Descriptions of new Crinoidea and Echinoidea from the Carboniferous rocks of the western states, with a note on the genus Onychaster : Proceedings of the Academy of Natural Sciences of Philadelphia, v. 21, p. 6783.
Melchin, M.J., Cooper, R.A., and Sadler, P.M., 2004, The Silurian Period, in Gradstein, F.M., Ogg, J.G., and Smith, A.G., eds. A Geologic Time Scale 2004: Cambridge, UK, Cambridge University Press, p. 188201.
Miller, J.S., 1821, A Natural History of the Crinoidea, or Lily-shaped Animals; With Observations on the Genera, Asteria, Euryale, Comatula and Marsupites : Bristol, England, C. Frost, 150 p.
Miller, S.A., 1883, Echinodermata, in The American Palaeozoic fossils, 2d ed., Cincinnati, Ohio, published by the author, p. 247334.
Moore, R.C., and Laudon, L.R., 1943, Evolution and classification of Paleozoic crinoids: Geological Society of America Special Paper, v. 46, 151 p.
Moore, R.C., and Teichert, C., eds., 1978, Treatise on Invertebrate Paleontology, Part T, Echinodermata 2, Crinoidea: Boulder, Colorado, and Lawrence, Kansas, Geological Society of America, University of Kansas, 1027 p.
Nestor, H., 1995, Ordovician and Silurian reefs in the Baltic area, in Lathuiliére, B., and Geister, J., eds., Coral Reefs in the Past, Present and Future: Publications du Service Geologique du Luxembourg, v. 29, p. 39–47.
Nestor, H., and Einasto, R., 1977, Model of facies and sedimentology for Paleobaltic epicontinental basin, in Kaljo, D.L., ed., Facies and Fauna Silurian of Baltica: Tallinn, Estonia, Institute of Geology AN ESSR, p. 89121.
Peters, S.E., and Ausich, W.I., 2008, A sampling-adjusted macroevolutionary history for Ordovician-Silurian crinoids: Paleobiology, v. 34, p. 104116.
Sepkoski, J.J. Jr., 1996, Patterns of Phanerozoic extinction: a perspective from global databases, in Walliser, O.H., ed. Global events and event stratigraphy in the Phanerozoic: Berlin, Springer-Verlag, p. 3151.
Springer, F., 1906, Discovery of the disk of Onychocrinus and further remarks on the Crinoidea Flexibilia: Journal of Geology, v. 14, p. 467523.
Springer, F., 1913, Crinoidea, in von Zittel, K.A., ed., Text-book of Paleontology (translated and edited by C. R. Eastman), 2d ed., London, Macmillan & Co., Ltd., v. 1, p. 173243.
Ubaghs, G., 1978, Skeletal morphology of fossil crinoids, in Moore, R.C., and Teichert, K., eds. Treatise on Invertebrate Paleontology, Part T, Echinodermata 2, v. 1: Boulder Colorado, and Lawrence, Kansas, Geological Society of America, University of Kansas Press, p. T58T216.
Urbanek, A., 1993, Biotic crises in the history of Upper Silurian graptoloids: a paleobiological model: Historical Biology, v. 7, p. 2950.
Vinn, O., Wilson, M.A., Ausich, W.I., and Toom, U., 2015, Tremichnus in crinoid pluricolumnals from the Silurian of western Estonia (Baltica): Carnets Geol., Madrid, v. 15, p. 239243.
von Zittel, K.A., 1879, Echinodermata, in Handbuch der Paläontologie: Paläozoologie, v. 1, pt. 1: München, Leipzig, Oldenbourg, p. 308560.
von Zittel, K.A., 1895, Grundzüge der Palaeontologie (Palaeozoologie): München, Oldenbourg, 971 p.
Wachsmuth, C., and Springer, F., 1880–1886, Revision of the Palaeocrinoidea: Proceedings of the Academy of Natural Sciences of Philadelphia pt. I, The families Ichthyocrinidae and Cyathocrinidae (1880), p. 226−378, (separate repaginated p. 1−153). Pt. II. Family Sphaeroidocrinidae, with the sub-families Platycrinidae, Rhodocrinidae, and Actinocrinidae (1881), p. 177−411, (separate repaginated, p. 1−237). Pt. III, sec. 1: Discussion of the classification and relations of the brachiate crinoids, and conclusion of the generic descriptions (1885), p. 225−364, (separate repaginated, 1−138). Pt. III, sec. 2: Discussion of the classification and relations of the brachiate crinoids, and conclusion of the generic descriptions (1886), p. 64−226 (separate repaginated to continue with section 1, p. 139−302).
Webster, G.D., and Webster, D.W., 2014, Bibliography and index of Paleozoic crinoids, coronates, and hemistreptocrinoids, 1758–2012: (accessed April 14, 2016).
Wisshak, M., Kroh, A., Bertling, M., Knaust, D., Nielsen, J.K., Jagt, J.W.M., Newmann, C., and Nielsen, K.S.S., 2015, In defence of an iconic ichnogenus − Oichnus Bromley, 1981: Annales Societatis Geologorum Poloniae, v. 85, p. 445451.
Zonneveld, J.-P, and Gingras, M.K., 2014, Sedilichnus, Oichnus, Fossichnus, and Tremichnus: ‘small round holes in shells’ revisited: Journal of Paleontology, v. 88, p. 895950.

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

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


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