New late Smithian (Early Triassic) ammonoids from the Lusitandiadalan Member, Vikinghøgda Formation, Svalbard.

• Published in: Norwegian Journal of Geology
• Main Authors: Piazza, Veronica, Hammer, Øyvind, Jattiot, Romain
• Other Authors: Museum für Naturkunde Berlin, Natural History Museum Oslo, University of Oslo (UiO), Paläontologisches Institut und Museum, Universität Zürich Zürich (UZH), Biogéosciences UMR 6282 Dijon (BGS), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2017
• Subjects: Ammonoid biostratigraphy; Tardus Zone; Smithian; Prionitidae; Svalbard; Boreal Realm; [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology; Lusitaniadalen; Stensiöfjellet; Vikinghøgda; Spitsbergen
• Online Access: https://hal.archives-ouvertes.fr/hal-01660564; https://doi.org/10.17850/njg97-2-03

13 pages International audience A single carbonate concretion from the uppermost Lusitaniadalen Member (‘Fish Niveau’, Vikinghøgda Formation) at Stensiöfjellet, Spitsbergen,contains a fairly rich assemblage of late Smithian (Early Triassic, Olenekian) ammonoids. The main species identified are Wasatchites tridentinusSpath, 1934, Wasatchites cf. distractus (Waagen, 1895), Anasibirites kingianus (Waagen, 1895), Arctoprionites nodosus (Frebold, 1930),Arctoprionites resseri (Mathews, 1929) and Xenoceltites subevolutus Spath, 1930. Two taxa are here discussed: Prionitid sp. and Arctoceraserebori sp. nov. The assemblage provides new information about the Early Triassic biostratigraphy and palaeogeography of the Boreal Realm. Thecomposition of the Spitsbergen fauna is in good agreement with other assemblages within and outside the Boreal Realm and essentially comprisescosmopolitan taxa. Only Arctoceras erebori sp. nov. and Prionitid sp. are as yet restricted to Spitsbergen. The newly reported occurrence of lowpaleolatitude taxa from Spitsbergen strengthens the cosmopolitan distribution of ammonoids during late Smithian time, thus improving existingcorrelation.