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Pàgina inicial > Articles > Articles publicats > Palaeoecology of Middle Triassic tetrapod ichnoassociations (middle Muschelkalk, NE Iberian Peninsula) and their implications for palaeobiogeography in the western Tethys region |
Data: | 2021 |
Resum: | Tetrapod ichnology is a powerful tool to reconstruct the faunal composition of Middle Triassic ecosystems. However, reconstructions based on a single palaeoenvironment provide an incomplete and impoverished picture of the actual palaeodiversity. In this paper, we analyse Middle Triassic tetrapod ichnoassociations from the detrital Muschelkalk facies of the Catalan Basin of northeast Spain, ranging from terrestrial to coastal settings. We identified two main tetrapod ichnoassociations, preserved in two different palaeoenvironments, comprising the following ichnogenera and morphotypes: Procolophonichnium, Chelonipus, Rhynchosauroides, Rotodactylus, Chirotherium, Isochirotherium, Sphingopus, and indeterminate chirotheriids. We also statistically analyse a database of all known Middle Triassic tetrapod footprint localities worldwide; this database includes, for each track locality, the precise age, the palaeoenvironment and the presence/absence of ichnotaxa. Our results on the composition of ichnofauna within the palaeoenvironments of the Catalan Basin are integrated into this database. This approach allows us to revisit the palaeoenvironmental bias linked to the marine transgression that affected the Western Tethys region. Tetrapod ichnoassociations reveal the following palaeoenvironmental patterns: (1) in coastal settings, ichnoassociations are Rhynchosauroides-dominated and diversity is relatively low; (2) in terrestrial settings and those with less marine influences, ichnoassociations are non-Rhynchosauroides-dominated, usually characterised by more abundant chirotheriid tracks and, generally, a higher track diversity. The correlation between tetrapod ichnoassociations and sedimentary facies reveals how palaeoenvironmental constraints influenced faunal assemblages, especially those of the Middle Triassic of the Western Tethys region. Ichnoassociations allow the ecological response of tetrapod faunas to the environmental changes to be inferred for this critical time interval. Marine transgressions strongly influenced tetrapod ecosystems: environmental conditions were key for the faunal recovery in the aftermath of the end-Permian extinction, with the settlement of the so-called modern faunas and the rise of the dinosaur lineage. |
Ajuts: | Agència de Gestió d'Ajuts Universitaris i de Recerca 2020/FI_B 00472 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-86 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1666 Agència de Gestió d'Ajuts Universitaris i de Recerca 2013-CTP-00013 Ministerio de Economía y Competitividad CGL2017-82654-P Ministerio de Ciencia e Innovación IJC2018-037685-I |
Nota: | Altres ajuts: we acknowledge support from the CERCA programme (ICP) from the Generalitat de Catalunya, and the projects "Evolució dels ecosistemes amb faunes de vertebrats del Permià i el Triàsic de Catalunya" (ref. 2014/100606) and "Evolució dels ecosistemes durant la transició Paleozoic-Mesozoic a Catalunya" (ref. CLT009/18/00066), based at the ICP and financially supported by the Departament de Cultura (Generalitat de Catalunya). |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Tetrapod footprints ; Palaeoenvironments ; Coastal settings ; Anisian ; Ladinian ; Equatorial Pangaea |
Publicat a: | Palaeogeography, palaeoclimatology, palaeoecology, Vol. 565 (March 2021) , art. 110204, ISSN 0031-0182 |
Postprint 59 p, 3.8 MB |
Material suplementari Postprint. 45 p, 3.0 MB |