@misc{10481/93764,
year = {2024},
month = {7},
url = {https://hdl.handle.net/10481/93764},
abstract = {Marine benthic biota recovery after the Permian/Triassic extinction is still a challenging topic in several fossil
clades such as brachiopods. In fact, available data from the Early-Middle Triassic are scarce worldwide and their
global record derives from limited localities throughout the Tethys Ocean. This work presents the first record of
the Anisian Tetractinella-beds (Brachiopoda, Athyridida) in the peri-Iberian epicontinental platforms established
in the westernmost Tethys margins. Their utility as a reliable biohorizon marker is emphasised as they provide an
effective tool for age calibration and correlation in the middle Anisian (Pelsonian) successions, also supported by
the co-occurring fossil assemblage. In the South-Iberian Palaeomargin, Tetractinella-beds occur in an intensivelyburrowed
shallow-marine succession. The rich ichnological content has been exhaustively evaluated in order to
assess the ecological factors controlling the development of the brachiopod fauna. Three ichnoassemblages are
documented dominated by Oravaichnium, Balanoglossites and Thalassinoides, respectively. The gathered faunal,
ichnological, taphonomical, and sedimentological data reveal an alternation of sea-level changes influencing the
composition of the Anisian marine communities. The first stage consists of near-shore restricted environments
sporadically disturbed by short-term shallow-marine interludes, characterised by the presence of Oravaichnium
and its associated fauna. Subsequently, the Pelsonian transgression event is recorded (MID-2), documented by a
firm-ground surface pointed out by the development of a Balanoglossites surface, followed by the highstand, when
shallow epicontinental environments developed in connection with open-marine areas. This phase involved the
spreading of Tetractinella and deep-water bivalves. Finally, near-shore restricted conditions were re-established
typified by Oravaichnium and the last occurrences of Tetractinella, with the disappearance of the open sea-water
fauna. The maximum flooding reached after the Pelsonian transgression facilitated new palaeobiogeographical
migration routes, allowing for an Alpine-Germanic dispersion of taxa throughout the North-South epicontinental
Tethyan seaway as well as the earliest first faunal migration event from the Sephardic Bioprovince northwards to
the South-Iberian palaeomargin.},
keywords = {Lower Muschelkalk},
keywords = {Western Tethys},
keywords = {Betic Range},
keywords = {brachiopod-beds biohorizons},
keywords = {Balanoglossites},
keywords = {Pelsonian transgression},
title = {Ecological control of the Pelsonian colonisation event (Anisian, Triassic) leading to the first settlement of Tetractinella-beds (Brachiopoda) in the Iberian palaeomargins. Palaeobiogeographical and biostratigraphical significance},
doi = {https://doi.org/10.1016/j.palaeo.2024.112383},
author = {Baeza-Carratalá, José Francisco and Giannetti, Alice and Pérez-Valera, Fernando and Pérez-Valera, Juan Alberto and Pérez-López, Alberto},
}