Publication Date:
2024-01-22
Description:
Tetrapod diversity in Permian terrestrial ecosystems of southwestern Europe is poorly
recorded by bone specimens, but it is better represented by an important tetrapod ichnological
record that is relevant to our understanding of vertebrate communities in the equatorial
Pangaea. Herein, two tetrapod ichnoassociations from three new ichnosites, within Cisuralian
and Guadalupian volcanosedimentary terrestrial successions (the Lower Red Unit and the
Upper Red Unit deposits) of the Castellar de n’Hug sub-basin (Catalan Pyrenees, NE Iberian
Peninsula) are presented. Tetrapod ichnology in combination with stratigraphic and facies
analyses permit a characterisation of these ecosystems. The sedimentary deposits show an
evolution from fluvial meandering systems to playa-lake floodplains, denoting increased
aridification and seasonality under a monsoonal regime. The ichnofossil record shows how
tetrapod assemblages shifted from a prevalence of non-amniotes and eureptiles to a
dominance of therapsids, eureptiles and parareptiles. The reported ichnotaxa are distributed in
two ichnoassociations. The first preserves Batrachichnus, Dromopus, Hyloidichnus,
Characichnos and an indeterminate tetrapod morphotype, whereas the second is defined by
the presence of Dromopus, Hyloidichnus, Brontopus antecursor and Pachypes. The
stratigraphically older ichnoassociation, preserved in volcaniclastic and fluvial deposits,
presents features of the early Erpetopus biochron, whereas the stratigraphically younger one,
preserved in playa-lake deposits, is constrained to the Brontopus sub-biochron.
Biostratigraphic and magnetostratigraphic data suggest a late Cisuralian to middle
Guadalupian age for the whole succession. The ichnoassemblage highlights a
palaeobiogeographical connection between the Pyrenean Basin and other peri-Tethyan
basins, which allows us to expand our knowledge about the palaeoecology and
palaeobiodiversity of the Cisuralian to Guadalupian terrestrial ecosystems.
Description:
Published
Description:
111837
Description:
OSA1: Variazioni del campo magnetico terrestre, imaging crostale e sicurezza del territorio
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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