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Article: Cambrian trilobites from the Huérmeda Formation (Iberian Chains, north‐east Spain) and the inadequacy of the Marianian Stage

Papers in Palaeontology - Volume 5 Issue 2 - Cover
Publication: Palaeontology
Volume: 5
Part: 2
Publication Date: May 2019
Page(s): 299 321
Author(s): J. Javier Álvaro, Jorge Esteve, Fernando Gracia, and Samuel Zamora
DOI: 10.1002/spp2.1237
Addition Information

How to Cite

ÁLVARO, J.J., ESTEVE, J., GRACIA, F., ZAMORA, S. 2019. Cambrian trilobites from the Huérmeda Formation (Iberian Chains, north‐east Spain) and the inadequacy of the Marianian Stage. Papers in Palaeontology, 5, 2, 299-321. DOI: /doi/10.1002/spp2.1237

Author Information

  • J. Javier Álvaro - Instituto de Geociencias (CSIC‐UCM) Dr Severo Ochoa 7 Madrid 28040 Spain
  • Jorge Esteve - Departamento de Geociencias Universidad de los Andes Cra. 1 no. 18A‐10 AA 4976 Bogotá DC Colombia
  • Fernando Gracia - Valle de Broto 18, 2°H Zaragoza 50015 Spain
  • Samuel Zamora - Instituto Geológico y Minero de España Manuel Lasala 44, 9°B Zaragoza 50006 Spain

Publication History

  • Issue published online: 03 May 2019
  • Manuscript Accepted: 30 June 2018
  • Manuscript Received: 22 March 2018

Funded By

Spanish MINECO Ministry. Grant Number: CGL2017‐87631

Online Version Hosted By

Wiley Online Library
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Abstract

A taxonomic study of the trilobites found in the Marianian parastratotype of the Iberian Chains, north‐east Spain, results in the recognition of the new redlichiid Redlichia isuelaensis sp. nov., the ellipsocephalid Lusatiops ribotanus, and the saukiandids Onaraspis garciae sp. nov., Paulaspis tiergaensis gen. et sp. nov. and Luciaspis matiasi gen. et sp. nov. The diagnosis of the new Subfamily Onaraspininae (Saukiandidae) and its genera takes into account distinct differences in the thorax, which is subdivided into prothorax with spinose and/or macropleural tergites and opistothorax with micropleurid segments. Onaraspis geyeri sp. nov. is erected based on material previously described in Jordan, which was assigned to poorly preserved material of Myopsolenites palmeri from Israel. The temporal correlation of Marianian endemic‐dominant trilobites throughout the Variscan tectonostratigraphic units of the Iberian Peninsula is not supported by acritarchs, archaeocyaths or trilobites. Three diachronous horizons have been proposed to mark the base of the Marianian (based on the first occurrence of two trilobite genera and one archaeocyathan assemblage zone) and two diachronous horizons for the top (based on the first and last occurrence of different trilobite genera). As a result, the Cambrian Epoch‐2 Marianian Stage is ill‐defined and rendered invalid for correlation throughout the Iberian Peninsula.

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