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Myrtineoxylon gen. nov.: The first fossil wood record of the tribe Myrteae (Myrtaceae) in eastern Asia

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Abstract:

The new genus and species Myrtineoxylon maomingensis is described from the Late Eocene Youganwo Formation of Maoming Basin, South China. It is the first record of fossil wood from eastern Asia assigned to Myrtaceae. The combination of solitary vessels, simple perforation plates, alternate vestured intervessel pits, bordered vessel-ray pits, vasicentric tracheids, ground tissue fibre-tracheids, diffuse and diffuse-in-aggregate parenchyma in 3–8 cells strands, and 1–3-seriate, strongly heterocellular rays, and absence of crystals is suggestive of a position of the fossil in the tribe Myrteae (informal "Australasian group"), a basal lineage in Myrtaceae. This is the first fossil record from eastern Asia and from all of Eurasia confidently referred to this tribe.

Keywords: BIOGEOGRAPHY; FOSSIL WOOD; LATE EOCENE; MYRTACEAE; MYRTEAE; MYRTINEOXYLON; YOUGANWO FORMATION

Document Type: Research Article

DOI: http://dx.doi.org/10.12705/624.7

Affiliations: 1: Komarov Botanical Institute of the Russian Academy of Sciences, St. Petersburg 197376, Russia; Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park 2006, Johannesburg, South Africa 2: State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China

Publication date: August 21, 2013

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