A new occurence of the genus Tonkinella in northern Spain and the Middle Cambrian intercontinental correlation
Abstract
The genus Tonkinella is a typical polimeroid trilobite in lower Middle Cambrian rocks from Vietnam, Canada, U.S.A., India, Korea, Siberia, China and Argentina. It has recently been found in the Mediterranean region (Iberian Chain, northeastern Spain). In this paper we refer the finding of Tonkinella aff. breviceps in the Leonian (lower Middle Cambrian) of the Cantabrian Mountains (northern Spain), analysing its stratigraphical position, fossil assemblages, biochronology and utility for intercontinental correlation. The presence of this taxon allows us to make a more accurate correlation between the Middle Cambrian biochronological scales of Laurentia, the Mediterranean area and China.
Keywords
Trilobita. Tonkinella. Leonian (Middle Cambrian). Biostratigraphy. Correlation. Palaeobiogeography.
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PDFDOI: https://doi.org/10.1344/105.000001598
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Facultat de Ciències de la Terra Geociències Barcelona Institut de Diagnosi Ambiental Universitat Autònoma de Barcelona
Universitat de Barcelona i Estudis de l'Aigua (CSIC)
Geologica Acta (ISSN-1695-6133)
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Phone: +34 93 403 19 89 | E-mail: geologica-acta@ictja.csic.es