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Per Ahlberg, Skottland 2013

Per Ahlberg

Professor emeritus

Per Ahlberg, Skottland 2013

'Mediterranean Province' hyoliths from the middle Cambrian and Upper Ordovician of Sweden

Författare

  • John M. Malinky
  • Mats Eriksson
  • Per Ahlberg

Summary, in English

Nine species of hyoliths are described based on material collected in Skane, southern Sweden, during the first half of the last century. The material derives from the middle Cambrian (Cambrian provisional Series 3) Exsulans Limestone Bed at Almbacken east of Lund and the Upper Ordovician (Katian-Hirnantian) Lindegard Formation at Tommarp west of Simrishamn. The Almbacken assemblage consists of three taxa; Nephrotheca ruderalis Marek, 1989?, Buchavilites sp., and Orthothecid sp. 3. The Tommarp assemblage comprises Bactrotheca deleta Novak, 1891, Circotheca sp., Sololites sp., Orthothecid sp. 1 and 2, and one species of Quadrotheca Sysoev, 1958. Albeit small, the collections, altogether comprising some twenty specimens, have important paleobiogeographic implications for these metazoans. All hyoliths documented herein were formerly regarded as occurring solely in the 'Mediterranean' paleobiogeographic province, encompassing central and southwestern Europe, and North Africa. The material at hand reveals that the distribution of Buchavilites Marek, 1975, Circotheca Sysoev, 1958, Nephrotheca Marek, 1967, Quadrotheca, and Sololites Marek, 1967 is now extended to Baltica, further eroding the assumed strongly provincial nature of these organisms.

Avdelning/ar

  • Berggrundsgeologi

Publiceringsår

2009

Språk

Engelska

Sidor

281-291

Publikation/Tidskrift/Serie

GFF

Volym

131

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Ämne

  • Geology

Nyckelord

  • Baltica
  • Ordovician
  • Cambrian
  • Hyoliths
  • 'Mediterranean Province'
  • Sweden
  • Skane

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2000-0863