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Cenozoic migration of a desert plant lineage across the North Atlantic
Swedish Museum of Natural History, Department of Paleobiology. Department of Palaeobiology Swedish Museum of Natural History Box 50007 10405 Stockholm Sweden.ORCID iD: 0000-0001-9535-1206
Department of Botany and Biodiversity Research University of Vienna 1030 Vienna Austria.ORCID iD: 0000-0002-4241-9075
Department of Forest Botany, Faculty of Forestry Istanbul University‐Cerrahpaşa 34473 Bahçeköy Istanbul Turkey.ORCID iD: 0000-0001-9742-1319
Department of Palaeontology University of Vienna 1090 Vienna Austria;Ronin Institute for Independent Scholarship Montclair NJ 07043-2314 USA.ORCID iD: 0000-0002-0113-0320
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2023 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 238, no 6, p. 2668-2684Article in journal (Refereed) Published
Abstract [en]

Previous paleobotanical work concluded that Paleogene elements of the sclerophyllous subhumid vegetation of western Eurasia and western North America were endemic to these disjunct regions, suggesting that the southern areas of the Holarctic flora were isolated at that time. Consequently, molecular studies invoked either parallel adaptation to dry climates from related ancestors, or long-distance dispersal in explaining disjunctions between the two regions, dismissing the contemporaneous migration of dry-adapted lineages via land bridges as unlikely.

We report Vauquelinia (Rosaceae), currently endemic to western North America, in Cenozoic strata of western Eurasia. Revision of North American fossils previously assigned to Vauquelinia confirmed a single fossil-species of Vauquelinia and one of its close relative Kageneckia.

We established taxonomic relationships of fossil-taxa using diagnostic character combinations shared with modern species and constructed a time-calibrated phylogeny.

The fossil record suggests that Vauquelinia, currently endemic to arid and subdesert environments, originated under seasonally arid climates in the Eocene of western North America and subsequently crossed the Paleogene North Atlantic land bridge (NALB) to Europe. This pattern is replicated by other sclerophyllous, dry-adapted and warmth-loving plants, suggesting that several of these taxa potentially crossed the North Atlantic via the NALB during Eocene times.

Place, publisher, year, edition, pages
2023. Vol. 238, no 6, p. 2668-2684
Keywords [en]
biogeography, Kageneckia, North Atlantic land bridge, paleobotany, Paleogene, sclerophyllous plants, Vauquelinia
National Category
Natural Sciences Other Earth and Related Environmental Sciences Evolutionary Biology Botany
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-5475DOI: 10.1111/nph.18743OAI: oai:DiVA.org:nrm-5475DiVA, id: diva2:1818596
Funder
Swedish Research Council, 2015‐03986Swedish Research Council, 2021‐05849Available from: 2023-12-01 Created: 2023-12-11 Last updated: 2023-12-11Bibliographically approved

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Denk, ThomasBouchal, Johannes M.Güner, H. TuncayCoiro, MarioPigg, Kathleen B.
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