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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Detalles Bibliográficos
Publicado:	2006
Materias:	Argentina Casuarinaceae Eocene Gymnostoma Megafossils Patagonia Pollen dicotyledon extinction floral trait fossil record paleobiogeography paleobotany Australasia Chubut South America
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10585893_v167_n6_p1279_Zamaloa http://hdl.handle.net/20.500.12110/paper_10585893_v167_n6_p1279_Zamaloa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10585893_v167_n6_p1279_Zamaloa
record_format	dspace
spelling	paper:paper_10585893_v167_n6_p1279_Zamaloa2023-06-08T16:03:21Z Casuarinaceae from the eocene of Patagonia, Argentina 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. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10585893_v167_n6_p1279_Zamaloa 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 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.
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
publishDate	2006
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10585893_v167_n6_p1279_Zamaloa http://hdl.handle.net/20.500.12110/paper_10585893_v167_n6_p1279_Zamaloa
_version_	1768545154083323904

Casuarinaceae from the eocene of Patagonia, Argentina

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