Resumo

RAMOS, R. Soledad; BREA, Mariana  e  KROHLING, Daniela M. Primer registro de Cryptocaryoxylon Leisman, una Lauraceae de la Formación El Palmar (Pleistoceno tardío), Entre Ríos, Argentina. Rev. Mus. Argent. Cienc. Nat. [online]. 2015, vol.17, n.1, pp.59-70. ISSN 1853-0400.

This paper described the first record of Cryptocaryoxylon Leisman from the late Pleistocene of Argentina. The specimen was recovered in Paraje Salto Grande locality (Uruguay River Basin, Entre Ríos, Argentina) in fluvial sediments of the El Palmar Formation. The diagnostic features of the fossil specimen are: diffuse to semi-ring porous wood; small to medium and numerous vessels, solitary and in short radial multiples; tyloses abundant; vessels-ray parenchyma pits simple; axial parenchyma vasicentric, aliform and confluent; heterocellular rays, uniseriate and rarely biseriate, high; non-septate fibres with thick-walled, and numerous "oil cells" in rays. These anatomical characteristics suggest a relationship with Cryptocarya (Lauraceae). The eco-anatomical characteristics are consistent with a temperate-warm and humid climate during this time interval.

Palavras-chave : Cryptocaryoxylon sp. nov.; Lauraceae; El Palmar Formation; Late Pleistocene; Entre Ríos; Argentina.

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