Research Paper

Famennian conodont assemblage in the Compte section (Upper Devonian, Central Pyrenees) and its comparison with Eurasian sequences


HÉCTOR BARRERA-LAHOZ

Department of Earth Sciences, University of Zaragoza, C/ Pedro Cerbuna 12, 50009 Zaragoza, Spain; hectorpaleodevon@gmail.com.
Corresponding author

JOSÉ IGNACIO VALENZUELA-RÍOS

Department of Botany and Geology, University of Valencia, C/ Dr. Moliner 50, 46100 Burjasot, Spain; jose.i.Valenzuela@uv.es;

Department of Geodynamic, Stratigraphy and Paleontology, University Complutense of Madrid, C/ José Antonio Novais 12, 28040 Madrid, Spain.

JAU-CHYN LIAO

Department of Geodynamic, Stratigraphy and Paleontology, University Complutense of Madrid, C/ José Antonio Novais 12, 28040 Madrid, Spain; jaucliao@ucm.es.


ABSTRACT

A detailed study of the fossil assemblages of Famennian conodonts has been carried out in the Compte section in the Central Pyrenees. The studied section comprises the upper part of the Comabella Formation, the La Mena Fm and the lower part of the Barousse Fm. Fifty samples have been collected from a 11.73 m thick Famennian stratigraphic succession. Forty-seven lower–middle Famennian conodont taxa have been identified, belonging to four genera: Palmatolepis, Polygnathus, Icriodus and Mehlina. The identified conodont assemblages change through the studied section: in the lower part, Palmatolepis and Icriodus taxa are more frequent and in the overlaying strata, Palmatolepis and Polygnathus taxa are dominant. Several conodont taxa have been recorded for the first time in Central Pyrenees zone. The conodont sequence analysis suggests a lower to middle Famennian age (from the termini to mg. marginifera Zones) in the Compte section (Beds 98–120). On the other hand, a comparison of the Pyrenean conodont assemblages with those from other relevant regions has been carried out. The conodont associations from Compte shows certain similarities with those from western and eastern Europe; however, sequences from eastern and central Asian exhibit some differences

Key words: Conodonts, La Mena Fm, Palmatolepis, Polygnathus, Icriodus, Famennian.

How to cite: Barrera-Lahoz, H., Valenzuela-Ríos, J. I., & Liao, J.-C. (2024). Famennian conodont assemblage in the Compte section (Upper Devonian, Central Pyrenees) and its comparison with Eurasian sequences. Spanish Journal of Palaeontology, 39.

Received 4 December 2023, Accepted 5 May 2024, Published online 14 May 2024

https://doi.org/10.7203/sjp.28695