CONICET | Buscador de Institutos y Recursos Humanos

Abstract. NEW GENUS AND SPECIES OF LIANE FROM THE UPPER MIOCENE (PALO PINTADO FORMATION), SALTANEW GENUS AND SPECIES OF LIANE FROM THE UPPER MIOCENE (PALO PINTADO FORMATION), SALTA PROVINCE, ARGENTINA. Ranunculodendron anzoteguiae, a new genus and species of fossil liane from the Upper Miocene Palo Pintado Fomation of Salta Province, Argentina is described. It is a circular liane, 4 mm in diameter, externally ribbed. The pith is excentric, whit 4 protoxilem vessels and secondary xylem divided into wedges by parenchymatous rays, all surrounded by cambium, phloem and cortex. The histological characters were compared with those of Lardizabalaceae and Menispermaceae both of the Ranunculales. Comparisons were made also among other fossil lianes: Lardizabaloxylon lardizabaolidesROVINCE, ARGENTINA. Ranunculodendron anzoteguiae, a new genus and species of fossil liane from the Upper Miocene Palo Pintado Fomation of Salta Province, Argentina is described. It is a circular liane, 4 mm in diameter, externally ribbed. The pith is excentric, whit 4 protoxilem vessels and secondary xylem divided into wedges by parenchymatous rays, all surrounded by cambium, phloem and cortex. The histological characters were compared with those of Lardizabalaceae and Menispermaceae both of the Ranunculales. Comparisons were made also among other fossil lianes: Lardizabaloxylon lardizabaolidesLardizabaloxylon lardizabaolides Shönfeld, Vitaceoxylon ranunculiformis Poole y Wilkinson and Menispermoxylon sp. Vozenin-Serra, Prevé- Gill and Ginsburg. The geological, palynological and megafloral data are considered to infer paleoclimatic conditions in which the lianes habited.Vitaceoxylon ranunculiformis Poole y Wilkinson and Menispermoxylon sp. Vozenin-Serra, Prevé- Gill and Ginsburg. The geological, palynological and megafloral data are considered to infer paleoclimatic conditions in which the lianes habited.