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Paläontologische Zeitschrift

, Volume 69, Issue 1–2, pp 213–221 | Cite as

The elkaniide brachiopodVolborthia from the lower ordovician of Baltoscandia

  • Lars E. Holmer
  • Leonid Popov
Article

Abstract

The rare, enigmatic brachiopodVolborthia recurva (Kutorga) is redescribed based on new, well preserved collections from the Lower Ordovician (lower Llanvirn; Oeland Series; Kunda Stage) of Ingria (St. Petersburg district); it is also recorded for the first time from Sweden, where it occurs in the Kunda Stage on the Island of Oland.V. recurva has usually been classified questionably within the order Paterinida, but the shell structure, micro-ornamentation, muscle scars, and presence of a lingulid-type pedicle groove now indicate that it is an aberrant member of the lingulid family Elkaniidae; it is the only known lingulid with a high conical dorsal valve characterised by mixoperipheral growth.

Keywords

Ordovician Biozone Ventral Valve Dorsal Valve Posterior View 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Kurzfassung

Der seltene und rätselhafte BrachiopodeVolborthia recurva (Kutorga) wird erneut beschrieben unter Bezug auf neues, gut erhaltenes Material aus dem Unteren Ordoviz (unteres Llanvirn, Oeland-Serie, Kunda-Stufe) von Ingermanland (Gebiet von St. Petersburg); diese Art wird erstmals auch in der Kunda-Stufe der Insel Öland (Schweden) nachgewiesen.V. recurva wurde gewöhnlich unter Vorbehalt in die Ordnung Paterinida gestellt, jedoch die Schalenstruktur, Mikro-Ornamentierung, Muskelnarben und die Anwesenheit einer für die Linguliden typischen Stielrinne weisen darauf hin, daß diese Art ein aberranter Vertreter der linguliden Familie Elkaniidae ist. Sie ist der einzige bekannte Lingulide mit einer hoch-konischen dorsalen Klappe, die durch mixoperipheres Wachstum gekennzeichnet wird.

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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 1995

Authors and Affiliations

  • Lars E. Holmer
    • 1
  • Leonid Popov
    • 2
  1. 1.Institute Earth SciencesHistorical Geology and PalaeontologyUppsala
  2. 2.VSEGEISt. PetersburgRussia

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