Taxonomical diversity and palaeobiogeographical affinity of belemnites from the Pliensbachian–Toarcian GSSP (Lusitanian Basin, Portugal)

Costa Rita P, Duarte LV, Weis R, de Baets K (2021)

Publication Type: Journal article, Original article

Publication year: 2021

Journal

Papers in Palaeontology Wiley

Book Volume: 7

Pages Range: 1321-1349

DOI: 10.1002/spp2.1343

Open Access Link: https://doi.org/10.1002/spp2.1343

Abstract

High‐resolution analysis of the late Pliensbachian – early Toarcian belemnite assemblages from the Peniche section (Lusitanian Basin) has enabled, for the first time, recognition of eight taxa of the suborder Belemnitina, previously reported from contemporaneous north‐west Tethyan and Arctic sections. The presence of Bairstowius amaliae sp. nov. in the late Pliensbachian (emaciatum Zone) represents a novelty given that hitherto the genus Bairstowius was known only from late Sinemurian and early Pliensbachian deposits. Additionally, the replacement of Bairstowius amaliae by Catateuthis longiforma, during the latest Pliensbachian, suggests an evolutionary relationship between the two taxa. This relationship suggests a new scenario for the subsequent development of endemic Toarcian Boreal–Arctic faunas, characterized by the occurrence of Catateuthis. Comparison of the Peniche belemnite fauna with coeval faunas from the Mediterranean/Submediterranean and Euro‐Boreal domains indicates taxonomic uniformity during the late Pliensbachian and early Toarcian (emaciatum and polymorphum Zones), in the north‐west Tethys. Despite the lack of a marked taxonomic turnover, the Pliensbachian–Toarcian boundary corresponds to a slight decrease in diversity observed not only in the Lusitanian Basin but also in coeval north‐western European basins. Ordination and cluster analyses indicate that the largest changes in belemnite diversity and palaeogeographical distribution occurred rather during the Toarcian Oceanic Anoxic Event (base of the levisoni Zone). This event is marked by the extinction of taxa, affecting more severely the Mediterranean/Submediterranean domain and resulting in a more pronounced provincial differentiation among north‐western European and Arctic belemnite faunas.

Authors with CRIS profile

Patrícia Rita Lehrstuhl für Paläoumwelt Kenneth de Baets Lehrstuhl für Paläoumwelt

Related research project(s)

Size reductions during hyperthermal events: early warnings of environmental deterioration or signs of extinction? (EarlyWarn) Dec. 1, 2019 - Dec. 1, 2022

Involved external institutions

Nationalmuseum für Naturgeschichte / Musée national d’histoire naturelle LU Luxembourg (LU) Universidade de Coimbra PT Portugal (PT)

How to cite

APA:

Costa Rita, P., Duarte, L.V., Weis, R., & de Baets, K. (2021). Taxonomical diversity and palaeobiogeographical affinity of belemnites from the Pliensbachian–Toarcian GSSP (Lusitanian Basin, Portugal). Papers in Palaeontology, 7, 1321-1349. https://dx.doi.org/10.1002/spp2.1343

MLA:

Costa Rita, Patrícia, et al. "Taxonomical diversity and palaeobiogeographical affinity of belemnites from the Pliensbachian–Toarcian GSSP (Lusitanian Basin, Portugal)." Papers in Palaeontology 7 (2021): 1321-1349.

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