Paleontological Journal

, Volume 47, Issue 2, pp 154–161 | Cite as

A new genus of Parablastoidea (echinodermata) from the Middle Ordovician of Ladoga glint on the Volkhov river (Ladoga region)

  • S. V. Rozhnov


A new genus and species of the small echinoderm class Parablastoidea, with an unusual starshaped theca, from the Middle Ordovician of the lower reaches of the Volkhov River is described. Functional features of its food-gathering system, the origin and functional role of the ambulacral and oral crests are discussed.


Parablastoidea new taxa Middle Ordovician Ladoga Region 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Billings, E., On the Crinoidea of the Lower Silurian Rocks of Canada, Geol. Surv. Can. Fig. Descrip. Canad. Org. Rem., 1859, vol. 4, pp. 1–72.Google Scholar
  2. Fay, R.O., Parablastoids, in Treatise on Invertebrate Paleontology: Part S, Echinodermata 1 (1), New York-Lawrence: Geol. Soc. Am.; Univ. Kansas Press, 1968, pp. 291–296.Google Scholar
  3. Hudson, G.H., On Some Pelmatozoa from the Chazy Limestone of New York, Bull. New York St. Mus. Geol. Pap., 1907, no. 107, pp. 97–152.Google Scholar
  4. Ivantsov, A.Yu., Ordovician Trilobites of the Subfamily Asaphinae of the Ladoga Glint, Paleontol. J., 2003, vol. 37,suppl. no. 3, pp. 229–336.Google Scholar
  5. Jaekel, O., Phylogenie und System der Pelmatozoen, Paläontol. Z., 1918, no. 3, pp. 1–128.Google Scholar
  6. Rozhnov, S.V., Crinoids of the Superfamily Pisocrinacea, Tr. Paleontol. Inst. Akad. Nauk SSSR, 1981, vol. 192, pp. 1–128).Google Scholar
  7. Rozhnov, S.V., Sibling Echinoderm Taxa on Isolated Ordovician Continents: Problem of the Center of Origin, Bull. Geosci., 2010, vol. 85, no. 4, pp. 671–678.CrossRefGoogle Scholar
  8. Sprinkle, J., Morphology and Evolution of Blastozoan Echinoderms, Cambridge: Harvard Univ. Mus. Compar. Zool. Spec. Publ., 1973.Google Scholar
  9. Sprinkle, J. and Sumrall, C.D., New Parablastoids from the Western United States, Paleontol. Contr. Univ. Kansas. N. Ser., 2008, no. 16, pp. 1–14.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  1. 1.Borissiak Paleontological InstituteRussian Academy of SciencesMoscowRussia

Personalised recommendations