https://orcid.org/0000-0002-6604-4415
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ABSTRACT
New trilobites from the upper part of the Pusa Formation (base of Cambrian Stage 3) in Central Spain are studied for their systematic and biostratigraphic significance. The trilobites Proabadiella toletana n. gen. et sp., Proabadiella vidalii n. gen. et sp., and a genus et species indet. are recorded with other fossils from the lower Ovetian regional Stage and archaeocyathan Zone I, which had, until now, provided only undetermined trilobites. The Proabadiella morphology is intermediate between that of the oldest genera of trilobites belonging to the families Abadiellidae and Bigotinidae, confirming the old age inferred for the new trilobites co-occurring with the archaeocyathan assemblage. Our findings permit presenting a new trilobite zonation for the lower Ovetian regional Stage (lower Cambrian Stage 3). A correlation is proposed with the other stratigraphically lowermost trilobites recorded globally.
Acknowledgments
We are grateful to Isabel Pérez Urresti for technical support. Three anonymous referees are thanked for their constructive reviews and C.B. Skovsted (Stockholm) is thanked for his efforts in editing the article. This is a contribution to the GIUV2017-395 Research Group of the Universitat de València and IGCPs 652 and 668. JAGV acknowledges support from project PRF 0153AB-A33 (PETRONAS), as well as from YUTP-FRG 015LCO-081, YUTP-FRG0153AA-H11 and URIF 2014-00735 (0153AA-B61) (all UTP).
Data archiving statement
This published work and the nomenclatural acts it contains have been registered in ZooBank: http://zoobank.org/References/A3A2E5ED-6631-4CE5-88B2-10C9C1CB6753
Disclosure statement
No potential conflict of interest was reported by the authors.