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Taxonomy and palaeoecology of two widespread western Eurasian Neogene sclerophyllous oak species: Quercus drymeja Unger and Q. mediterranea Unger
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-9535-1206
National and Kapodistrian University of Athens, Faculty of Geology and Geoenvironment, Department of Historical Geology and Paleontology, Panepistimiopolis, Athens 15784, Greece.
Istanbul University, Faculty of Forestry, Department of Forest Botany, 34473 Bahceköy, Istanbul, Turkey.
Swedish Museum of Natural History, Department of Paleobiology. (Paleobiologi)ORCID iD: 0000-0002-4241-9075
Show others and affiliations
2017 (English)In: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, ISSN 0034-6667, Vol. 241, 98-128 p.Article in journal (Refereed) Published
Abstract [en]

Sclerophyllous oaks (genus Quercus) play important roles in Neogene ecosystems of south-western Eurasia. Modern analogues (‘nearest living relatives’) for these oaks have been sought among five of six infrageneric lineages of Quercus, distributed across the entire Northern Hemisphere. A revision of leaf fossils from lower Miocene to Pliocene deposits suggests that morphotypes of the Quercus drymeja complex are very similar to a number of extant Himalayan, East Asian, and Southeast Asian species of Quercus Group Ilex and may indicate subtropical, relatively humid conditions. Quercus mediterranea comprises leaf morphotypes that are encountered in modern Mediterranean species of Quercus Group Ilex, but also in Himalayan and East Asian members of this group indicating fully humid or summer-wet conditions. The fossil taxa Quercus drymeja and Q. mediterranea should be treated as morphotype complexes, which possibly comprised different biological species at different times. Quercus mediterranea, although readily recognizable as a distinct morphotype in early to late Miocene plant assemblages, may in fact represent small leaves of the same plants that constitute the Quercus drymeja complex. Based on the available evidence, the taxa [GG1] forming the Q. drymeja complex and Q. mediterranea thrived in fully humid or summer-wet climates. The onset of the modern vegetational context of Mediterranean sclerophyllous oaks is difficult to trace, but may have been during the latest Pliocene/early Pleistocene.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2017. Vol. 241, 98-128 p.
Keyword [en]
Quercus Group Ilex, Plant fossil, Modern analogue, Palaeoecology, Niche evolution
National Category
Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-2309DOI: 10.1016/j.revpalbo.2017.01.005OAI: oai:DiVA.org:nrm-2309DiVA: diva2:1084995
Projects
440886
Funder
Swedish Research Council, 2015-03968
Available from: 2017-03-27 Created: 2017-03-27 Last updated: 2017-05-04Bibliographically approved

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The full text will be freely available from 2018-03-31 16:07
Available from 2018-03-31 16:07

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S003466671630104X

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