A Paleogene trans-Antarctic distribution for Ripogonum (Ripogonaceae: Liliales)?

Authors
Carpenter, Raymond; Wilf, Peter; Conran, John; Cuneo, Nestor Ruben
Publication Year
2014
Language
English
Format
article
Status
Published version
Description
An impressive and growing list of biogeographically interesting plant and animal taxa occur in Paleogene sediments of both southern Australia and southern South America, indicating trans-Antarctic distributions during the warm past. Here, we provide the first evidence that the living, woody, Australasian monocot Ripogonum was present during the early Eocene of Patagonia, Argentina. Two fossil leaves are sufficiently well preserved in overall shape, size, and fine venation details to be assigned to the genus, being closely comparable to leaves of the extant species R. album and R. scandens and the recently described early Eocene species R. tasmanicum from Tasmania, Australia. The new species, R. americanum, is described. Overall, this evidence suggests that Ripogonum had a significantly larger past range, including Antarctica, during the early Paleogene, when Antarctica was much more closely connected to both Tasmania and South America and high latitude climates were warm and wet. Ecologically, the South American Ripogonum was probably a scrambling vine in mesic forest and grew in association with a rich understory flora of ferns and angiosperms.
Fil: Carpenter, Raymond. University Of Tasmania. Faculty Of Science, Engineering & Technology; Australia
Fil: Wilf, Peter. State University Of Pennsylvania; Estados Unidos
Fil: Conran, John. University Of Adelaide;
Fil: Cuneo, Nestor Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Subject
Argentina
Australasia
Eocene
Ripogonum
Paleontología
Ciencias de la Tierra y relacionadas con el Medio Ambiente
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/19693