The Kinzers Formation (Pennsylvania, USA): the most diverse assemblage of Cambrian Stage 4 radiodonts

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Ressource 1Télécharger: Pates et al. 2018 Kinzers Radiodonts postprint.pdf (2432.84 [Ko])
Etat: Public
Version: Author's accepted manuscript
Licence: Non spécifiée
ID Serval
serval:BIB_CDF47BE6CBCB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The Kinzers Formation (Pennsylvania, USA): the most diverse assemblage of Cambrian Stage 4 radiodonts
Périodique
Geological Magazine
Auteur(s)
Daley Allison
ISSN
0016-7568
1469-5081
Statut éditorial
Publié
Date de publication
07/2019
Langue
anglais
Résumé
<jats:title>Abstract</jats:title><jats:p>Radiodonta, apex Cambrian predators such as <jats:italic>Anomalocaris</jats:italic> have been known from the Kinzers Formation (Cambrian Series 2, Stage 4 – Pennsylvania, USA) for nearly 100 years. Work over the last ten years, mainly on radiodont material from the Chengjiang (Cambrian Series 2, Stage 3 – Yunnan, China) and Burgess Shale (Miaolingian, Wuliuan – British Columbia, Canada), has greatly improved our knowledge of the diversity and disparity of radiodonts and their frontal appendages, including the description of new species, genera and families. Previous work identified two species of radiodonts from the Kinzers Formation: <jats:italic>Anomalocaris pennsylvanica</jats:italic> Resser, 1929 and <jats:italic>Anomalocaris</jats:italic>? cf. <jats:italic>pennsylvanica</jats:italic> based on isolated frontal appendage material (Briggs, 1979). A restudy of Kinzers Formation material shows that only some of the specimens can be confirmed as <jats:italic>Anomalocaris pennsylvanica</jats:italic>, and a number of specimens previously attributed to <jats:italic>Anomalocaris</jats:italic> in fact belong to other more recently discovered radiodont genera <jats:italic>Amplectobelua</jats:italic> and <jats:italic>Tamisiocaris</jats:italic>. This reinterpretation makes the Kinzers Formation the most diverse Cambrian Stage 4 Burgess Shale Type Lagerstätten in terms of number of radiodont species. This assemblage includes the youngest known <jats:italic>Tamisiocaris</jats:italic> and the first from outside Greenland, the only <jats:italic>Amplectobelua</jats:italic> from Stage 4 and the oldest from Laurentia, two specimens tentatively assigned to the recently described Chengjiang genus <jats:italic>Laminacaris</jats:italic>, and the endemic <jats:italic>Anomalocaris pennsylvanica</jats:italic>. The identification of these new radiodont taxa increases the total known diversity of the Kinzers Formation to more than ten species, and so it should now be considered a Tier 2 Lagerstätte.</jats:p>
Création de la notice
12/03/2020 11:29
Dernière modification de la notice
13/03/2020 7:10
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