A blind trilobite with Baltic affinities from Cambrian Series 3 of the Iberian Chains, Spain, and its stratigraphical and palaeobiogeographical significance

Three cranidia of a conocoryphid trilobite are described from the lower Caesaraugustan Regional Stage (upper part of provisional Cambrian Stage 5 within Cambrian Series 3) in the Iberian Chains, Spain. The material is from the upper part of the Mansilla Formation and the base of the overlying Murero...

Full description

Bibliographic Details
Published in:GFF
Main Authors: Chirivella Martorell, Juan B., Linan, Eladio, Ahlberg, Per, Gozalo, Rodolfo
Format: Article in Journal/Newspaper
Language:English
Published: Taylor & Francis 2015
Subjects:
Geology
Trilobites
Conocoryphidae
systematics
correlation
palaeobiogeography
middle Cambrian
Iberian Chains
Spain
Mansilla
Newfoundland
Online Access:https://lup.lub.lu.se/record/8220538
https://doi.org/10.1080/11035897.2015.1061593
Description
Summary:Three cranidia of a conocoryphid trilobite are described from the lower Caesaraugustan Regional Stage (upper part of provisional Cambrian Stage 5 within Cambrian Series 3) in the Iberian Chains, Spain. The material is from the upper part of the Mansilla Formation and the base of the overlying Murero Formation. It closely resembles Bailiella tenuicincta (Linnarsson, 1879), which has previously been described from the Ptychagnostus gibbus (Cambrian Stage 5) and lower P. atavus zones (lower Drumian Stage) of Baltica (Sweden and Bornholm), and from the P. atavus Zone of West Avalonia (Newfoundland). The record of B. cf. tenuicincta from the Mediterranean margin of West Gondwana provides additional evidence for considering the Acado-Baltic region a discrete biogeographical province, at least during the Cambrian 5 and Drumian ages.

Similar Items