RT Journal Article T1 The genus Serrodiscus (Trilobita) in the upper Marianian (early Cambrian) from nothern Huelva province, SW Spain A1 Collantes Ruiz, Luis A1 Mayoral Alfaro, Eduardo A1 Gozalo Gutiérrez, R. AB The presence of the genus Serrodiscus in the early Cambrian rocks from the province of Huelvahas been previously remarked by preceding authors. Nowadays, the genus Serrodiscus is noted as the first trilobite genus with global distribution in the early Cambrian oceanic platform environments, so its FAD is currently considered for the definition of the base of Cambrian Stage 4. Therefore, its presence in the Marianian rocks from northern Huelva could strengthen the correlation with another early Cambrian localities worldwide. PB Universidade Nova de Lisboa SN 0254 - 055X SN 2183 - 4431 (electrónico) YR 2021 FD 2021 LK http://hdl.handle.net/10272/20798 UL http://hdl.handle.net/10272/20798 LA eng NO Collantes Ruiz, Mayoral Alfaro, & Gozalo Gutiérrez. (2021). The genus Serrodiscus (Trilobita) in the upper Marianian (early Cambrian) from nothern Huelva province, SW Spain. In Ciências da Terra Procedia- Earth Sciences Journal Procedia Vol. 1. XVIII Encuentro de Jóvenes Investigadores en Paleontologia. Nova.id.fct. https://doi.org/10.21695/cterraproc.v1i0.394 NO We want to thank the Council of Environment and TerritorialPlanning from the Junta de Andalucía and the Directorate ofSierra de Aracena y Picos de Aroche Natural Park for providingpermission to work into the park. The present work has beencarried out with funding of the Junta de Andalucía to the RNM276 Research Group and the Centro Científico-Tecnológico deHuelva to the Department of Applied Geosciences, together withthe GIUV2017-395 research group of the University of Valencia.This work is a contribution to the project IGCP 652. DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026