The Jurassic plurotomarioidean gastropoda Laevitomaria and its palaeobiogeographical history

Titre The Jurassic plurotomarioidean gastropoda Laevitomaria and its palaeobiogeographical history
Titre court The Jurassic plurotomarioidean gastropoda Laevitomaria and its palaeobiogeographical history
Type de document article
Auteur(s) Gatto, R.
Monari, S.
Szabo, J.
Conti, M.A.
Date 2015
Abréviation du journal Acta Palaeontologica Polonica
Volume vol. 60
1
N° de page(s) 217-233
Résumé The genus Laevitomaria is reviewed and its palaeobiogeographical history is reconstructed based on the re-examination of its type species L. problematica, the study of material stored at the National Natural History Museum of Luxembourg, and an extensive review of the literature. The systematic study allows ascribing to Laevitomaria a number of Jurassic species from the western European region formerly included in other pleurotomariid genera. The following new combinations are proposed: Laevitomaria allionta, L. amyntas, L. angulba, L. asurai, L. daityai, L. fasciata, L. gyroplata, L. isarensis, L. joannis, L. repeliniana, L. stoddarti, L. subplatyspira, and L. zonata. The genus, which was once considered as endemic of the central part of the western Tethys, shows an evolutionary and palaeogeographical history considerably more complex than previously assumed. It first appeared in the Late Sinemurian in the northern belt of the central western Tethys involved in the Neotethyan rifting, where it experienced a first radiation followed by an abrupt decline of diversity in the Toarcian. Species diversity increased again during Toarcian-Aalenian times in the southernmost part of western European shelf and a major radiation occurred during the Middle Aalenian to Early Bajocian in the northern Paris Basin and southern England. After a latest Bajocian collapse of diversity, Laevitomaria disappeared from both the central part of western Tethys and the European shelf. In the Bathonian, the genus appeared in the south-eastern margin of the Tethys where it lasted until the Oxfordian.
ISSN 0567-7920
DOI 10.4202/app.2013.0012
Langue Anglais
Collection Notre bibliothèque
Gatto, R. et al., 2015. The Jurassic plurotomarioidean gastropoda Laevitomaria and its palaeobiogeographical history. vol. 60 n° 1. p. 217-233. ISSN : 0567-7920.

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