Paleontological Journal

, Volume 43, Issue 1, pp 12–18

Growth variability in the late Vendian problematics Parvancorina Glaessner

Authors

    • Paleontological InstituteRussian Academy of Sciences
  • A. Yu. Ivantsov
    • Paleontological InstituteRussian Academy of Sciences
Article

DOI: 10.1134/S003103010901002X

Cite this article as:
Naimark, E.B. & Ivantsov, A.Y. Paleontol. J. (2009) 43: 12. doi:10.1134/S003103010901002X

Abstract

Morphological and quantitative characteristics of the growth variability of two Parvancorina species were analyzed based on new abundant material from the Vendian of the White Sea. Growth variability in this problematic taxon appears to be wider than previously suggested. We found allometric growth in the White Sea population of P. minchami Glaessner, 1958, in contrast to isometric growth in Australian representatives of the species. Another White Sea species, P. sagitta Ivantsov, 2004, shows gradual formation of anchor-shaped structure in juveniles. Based on Australian material, it was previously believed that this structure did not change during ontogeny. These two distinctive features together with a strong variability of age-related measurements distinguish Parvancorina from other early arthropods (Scania, Primicaris), and cast doubt on the growth pattern as an argument in favor of the arthropodan nature of Parvancorina.

Key words

ArthropodaParvancorinaVendianEdiacaranRussiaAustralia
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Copyright information

© Pleiades Publishing, Ltd. 2009