Casuarinaceae from the eocene of Patagonia, Argentina
Casuarinaceae, today restricted to the Australasian region, has an extensive fossil record. In this article, we evaluate previous records and recent findings from Patagonia, where Casuarinaceae are known from the Tufolitas Laguna del Hunco (early Eocene) in northwestern Chubut, Argentina. Based on c...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10585893_v167_n6_p1279_Zamaloa |
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todo:paper_10585893_v167_n6_p1279_Zamaloa2023-10-03T16:00:58Z Casuarinaceae from the eocene of Patagonia, Argentina Zamaloa, M.D.C. Gandolfo, M.A. González, C.C. Romero, E.J. Cúneo, N.R. Wilf, P. Argentina Casuarinaceae Eocene Gymnostoma Megafossils Patagonia Pollen dicotyledon Eocene extinction floral trait fossil record paleobiogeography paleobotany Argentina Australasia Chubut Patagonia South America Casuarinaceae Gymnostoma Casuarinaceae, today restricted to the Australasian region, has an extensive fossil record. In this article, we evaluate previous records and recent findings from Patagonia, where Casuarinaceae are known from the Tufolitas Laguna del Hunco (early Eocene) in northwestern Chubut, Argentina. Based on characters found in numerous branchlets, infructescences, and male inflorescences with pollen of the Haloragacidites harrisii type, the presence of three fossil species within the genus Gymnostoma is confirmed: G. patagonicum comb. nov., G. archangelskyi sp. nov., and G. argentinum sp. nov. This is the oldest worldwide report of male inflorescences and the first record of vegetative branchlets and male inflorescences for South America. These fossils are of particular interest because Casuarinaceae is now extinct in South America, and they support the view that the family was diverse and had widespread distribution during the early Eocene climatic optimum. The diverse Gymnostoma described here further strengthens biogeographic links between Paleogene floras of Patagonia and Australasia. © 2006 by The University of Chicago. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10585893_v167_n6_p1279_Zamaloa |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Casuarinaceae Eocene Gymnostoma Megafossils Patagonia Pollen dicotyledon Eocene extinction floral trait fossil record paleobiogeography paleobotany Argentina Australasia Chubut Patagonia South America Casuarinaceae Gymnostoma |
| spellingShingle |
Argentina Casuarinaceae Eocene Gymnostoma Megafossils Patagonia Pollen dicotyledon Eocene extinction floral trait fossil record paleobiogeography paleobotany Argentina Australasia Chubut Patagonia South America Casuarinaceae Gymnostoma Zamaloa, M.D.C. Gandolfo, M.A. González, C.C. Romero, E.J. Cúneo, N.R. Wilf, P. Casuarinaceae from the eocene of Patagonia, Argentina |
| topic_facet |
Argentina Casuarinaceae Eocene Gymnostoma Megafossils Patagonia Pollen dicotyledon Eocene extinction floral trait fossil record paleobiogeography paleobotany Argentina Australasia Chubut Patagonia South America Casuarinaceae Gymnostoma |
| description |
Casuarinaceae, today restricted to the Australasian region, has an extensive fossil record. In this article, we evaluate previous records and recent findings from Patagonia, where Casuarinaceae are known from the Tufolitas Laguna del Hunco (early Eocene) in northwestern Chubut, Argentina. Based on characters found in numerous branchlets, infructescences, and male inflorescences with pollen of the Haloragacidites harrisii type, the presence of three fossil species within the genus Gymnostoma is confirmed: G. patagonicum comb. nov., G. archangelskyi sp. nov., and G. argentinum sp. nov. This is the oldest worldwide report of male inflorescences and the first record of vegetative branchlets and male inflorescences for South America. These fossils are of particular interest because Casuarinaceae is now extinct in South America, and they support the view that the family was diverse and had widespread distribution during the early Eocene climatic optimum. The diverse Gymnostoma described here further strengthens biogeographic links between Paleogene floras of Patagonia and Australasia. © 2006 by The University of Chicago. All rights reserved. |
| format |
JOUR |
| author |
Zamaloa, M.D.C. Gandolfo, M.A. González, C.C. Romero, E.J. Cúneo, N.R. Wilf, P. |
| author_facet |
Zamaloa, M.D.C. Gandolfo, M.A. González, C.C. Romero, E.J. Cúneo, N.R. Wilf, P. |
| author_sort |
Zamaloa, M.D.C. |
| title |
Casuarinaceae from the eocene of Patagonia, Argentina |
| title_short |
Casuarinaceae from the eocene of Patagonia, Argentina |
| title_full |
Casuarinaceae from the eocene of Patagonia, Argentina |
| title_fullStr |
Casuarinaceae from the eocene of Patagonia, Argentina |
| title_full_unstemmed |
Casuarinaceae from the eocene of Patagonia, Argentina |
| title_sort |
casuarinaceae from the eocene of patagonia, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_10585893_v167_n6_p1279_Zamaloa |
| work_keys_str_mv |
AT zamaloamdc casuarinaceaefromtheeoceneofpatagoniaargentina AT gandolfoma casuarinaceaefromtheeoceneofpatagoniaargentina AT gonzalezcc casuarinaceaefromtheeoceneofpatagoniaargentina AT romeroej casuarinaceaefromtheeoceneofpatagoniaargentina AT cuneonr casuarinaceaefromtheeoceneofpatagoniaargentina AT wilfp casuarinaceaefromtheeoceneofpatagoniaargentina |
| _version_ |
1782023501798965248 |