DEFINITIVE IDENTIFICATION OF LARIX (PINACEAE) WOOD BASED ON ANATOMY FROM THE MIDDLE EOCENE, AXEL HEIBERG ISLAND, CANADIAN HIGH ARCTIC

in IAWA Journal
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This paper provides the first definitive identification of fossil Larix Miller wood using the characteristic features of ray-tracheid bordered pits. The wood was recovered from the middle Eocene (Lutetian/Uintan; 41.3– 47.5 Ma) Buchanan Lake Formation on eastern Axel Heiberg Island in the Canadian High Arctic and extends the fossil record of Larix wood further back in geologic time. A new and rapid embedding method is described which provides a firm and non-destructive matrix for thinsectioning and examining the well-preserved details of the wood. The wood is associated with Larix altoborealis LePage & Basinger, a shortbracted species, which was previously described from this locality as the earliest known species of Larix.

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