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Taxonomy and palaeoecology of two widespread western Eurasian Neogene sclerophyllous oak species: Quercus drymeja Unger and Q. mediterranea Unger
Naturhistoriska riksmuseet, Enheten för paleobiologi.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.
Naturhistoriska riksmuseet, Enheten för paleobiologi. (Paleobiologi)ORCID-id: 0000-0002-4241-9075
Vise andre og tillknytning
2017 (engelsk)Inngår i: Review of Palaeobotany and Palynology, ISSN 0034-6667, E-ISSN 1879-0615, ISSN 0034-6667, Vol. 241, s. 98-128Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Amsterdam: Elsevier, 2017. Vol. 241, s. 98-128
Emneord [en]
Quercus Group Ilex, Plant fossil, Modern analogue, Palaeoecology, Niche evolution
HSV kategori
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Den föränderliga jorden
Identifikatorer
URN: urn:nbn:se:nrm:diva-2309DOI: 10.1016/j.revpalbo.2017.01.005OAI: oai:DiVA.org:nrm-2309DiVA, id: diva2:1084995
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440886
Forskningsfinansiär
Swedish Research Council, 2015-03968Tilgjengelig fra: 2017-03-27 Laget: 2017-03-27 Sist oppdatert: 2017-05-04bibliografisk kontrollert

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