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A new proteid salamander (Urodela, Proteidae) from the middle Miocene of Hambach (Germany) and implications for the evolution of the family
Dipartimento di Scienze della Terra Via Valperga Caluso 35 10125 Turin Italy.ORCID iD: 0000-0002-6491-0498
Institut Català de Paleontologia Miquel Crusafont Universitat Autònoma de Barcelona Edifici ICTA‐ICP, c/ Columnes s/n Campus de la UAB, 08193 Cerdanyola del Vallès Barcelona Spain.ORCID iD: 0000-0001-6544-5201
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0003-2268-5824
2021 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 65, no 1, article id e12585Article in journal (Refereed) Published
Abstract [en]

Members of the urodele family Proteidae currently account for eight extant species within two genera and at least four extinct species within three genera. The clade has a clear disjunct geographical range, with the extinct Paranecturus and the extant Necturus in North America and the extinct Mioproteus and the extant Proteus in Europe and Asia. A recent phylogenetic analysis supported a Eurasian clade including both fossil and living species found east of the Atlantic Ocean. However, the finding of a new proteid salamander, herein named Euronecturus grogu, from the Miocene of western Germany sheds new light on the evolution of this family, challenging the idea of all Eurasian members of the group deriving from a single lineage separated from the North American ones at least prior to the Oligocene. This new proteid taxon is based on five isolated atlases found in late Orleanian (MN 5) sediments in Hambach 6C, and displays features that are unknown in any other proteid, such as the presence of secondary dorsal crests, small and posteriorly-directed postzygapophyses, and (in at least some specimens) a wide and deep ventral fossa between the anterior cotyles. A phylogenetic analysis recovered the new taxon in an earl ybranching position within Proteidae, sister to all other proteids but the late Maastrichtian Paranecturus. It thus suggests the presence in Europe of a second proteid lineage, currently known only in the middle Miocene, that appears unrelated to the Mioproteus–Proteus clade.

Place, publisher, year, edition, pages
London: The Geological Society Publishing House, 2021. Vol. 65, no 1, article id e12585
Keywords [en]
Salamanders, skeletal morphology, phylogeny, Neogene, Germany
National Category
Natural Sciences Earth and Related Environmental Sciences Other Earth and Related Environmental Sciences
Research subject
Ecosystems and species history; The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-4895DOI: 10.1111/pala.12585OAI: oai:DiVA.org:nrm-4895DiVA, id: diva2:1715210
Funder
German Research Foundation (DFG), SFB 350
Note

We gratefully acknowledge the support of the mining company RWE POWER AG (Cologne) during fieldwork at the Hambach locality. LM received support from Fondi di Ateneo dell'Università di Torino (2018–2019) and from the SYNTHESYS Project http://www.synthesys.info/ (FR-TAF 2486, HU-TAF 2724, AT-TAF-8564). This is publication number 357 of the Museum of Geology and Palaeontology of the University of Torino. AV was funded by a Humboldt Research Fellowship from the Alexander von Humboldt Foundation during part of the development of this work. He is now funded by the Agencia Española de Investigación, with a Juan de la Cierva-Formación grant (FCI2019-039443-I/AEI/10.13039/501100011033). TM was funded by the Deutsche Forschungsgemeinschaft (DFG) Special Research Project SFB 350.

Available from: 2022-12-01 Created: 2022-12-01 Last updated: 2022-12-02Bibliographically approved

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