Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests

The 51.9 Ma Laguna del Hunco (LH) and 47.5 Ma Rí o Pichileuf ú (RP) floras from Patagonia, Argentina are unusually rich, angiosperm-dominated assemblages with living relatives in the low-latitude West Pacific, neotropics, and temperate southern latitudes. The diverse gymnosperms in these floras are...

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Detalles Bibliográficos
Autores principales: Zamaloa, María del Carmen, Gandolfo, María Alejandra, Cúneo, Nestor Rubén
Publicado: 2009
Materias:
Austrocedrus
Cupressaceae
Eocene
Laguna del Hunco
Libocedrus
Paleoclimate
Papuacedrus
Patagonia
Río Pichileufú
Subtropical rainforest
biogeographical region
biome
coniferous tree
fossil record
Gondwana
new record
paleobotany
paleoclimate
phytogeography
rainforest
steppe
type locality
South America
Austrocedrus chilensis
Gymnospermae
Magnoliophyta
Papuacedrus papuana
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v96_n11_p2031_Wilf
http://hdl.handle.net/20.500.12110/paper_00029122_v96_n11_p2031_Wilf
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00029122_v96_n11_p2031_Wilf
record_format dspace
spelling paper:paper_00029122_v96_n11_p2031_Wilf2023-06-08T14:23:04Z Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests Zamaloa, María del Carmen Gandolfo, María Alejandra Cúneo, Nestor Rubén Austrocedrus Cupressaceae Eocene Laguna del Hunco Libocedrus Paleoclimate Papuacedrus Patagonia Río Pichileufú Subtropical rainforest biogeographical region biome coniferous tree Eocene fossil record Gondwana new record paleobotany paleoclimate phytogeography rainforest steppe type locality Patagonia South America Austrocedrus Austrocedrus chilensis Cupressaceae Gymnospermae Libocedrus Magnoliophyta Papuacedrus Papuacedrus papuana The 51.9 Ma Laguna del Hunco (LH) and 47.5 Ma Rí o Pichileuf ú (RP) floras from Patagonia, Argentina are unusually rich, angiosperm-dominated assemblages with living relatives in the low-latitude West Pacific, neotropics, and temperate southern latitudes. The diverse gymnosperms in these floras are important for Gondwanan biogeographic history and paleoclimatic interpretations. "Libocedrus" prechilensis Berry 1938 (Cupressaceae), previously known only from the holotype (RP), a vegetative branch, is revised here based on new material from both localities, including a seed cone attached to a shoot with cuticle (LH). Characters of these fossils are diagnostic of monotypic Papuacedrus (highlands of New Guinea and Moluccas). Living P. papuana is most abundant in cloud forests receiving up to 4 m rainfall annually, whereas Austrocedrus (Libocedrus) chilensis, the basis of comparison when the fossil species was named, inhabits dry, cold steppe margins to mediterranean climates in southern South America. We establish Papuacedrus prechilensis comb. nov., which simultaneously invalidates a southern South American connection for the fossil floras and reveals a link to West Pacific montane rainforests. Combined evidence indicates a biome similar to extant subtropical, or tropical montane, rainforests that persisted for at least 4.4 Myr, linking elevated floral richness to abundant rainfall. Fil:Zamaloa, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gandolfo, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cúneo, N.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v96_n11_p2031_Wilf http://hdl.handle.net/20.500.12110/paper_00029122_v96_n11_p2031_Wilf
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Austrocedrus
Cupressaceae
Eocene
Laguna del Hunco
Libocedrus
Paleoclimate
Papuacedrus
Patagonia
Río Pichileufú
Subtropical rainforest
biogeographical region
biome
coniferous tree
Eocene
fossil record
Gondwana
new record
paleobotany
paleoclimate
phytogeography
rainforest
steppe
type locality
Patagonia
South America
Austrocedrus
Austrocedrus chilensis
Cupressaceae
Gymnospermae
Libocedrus
Magnoliophyta
Papuacedrus
Papuacedrus papuana
spellingShingle Austrocedrus
Cupressaceae
Eocene
Laguna del Hunco
Libocedrus
Paleoclimate
Papuacedrus
Patagonia
Río Pichileufú
Subtropical rainforest
biogeographical region
biome
coniferous tree
Eocene
fossil record
Gondwana
new record
paleobotany
paleoclimate
phytogeography
rainforest
steppe
type locality
Patagonia
South America
Austrocedrus
Austrocedrus chilensis
Cupressaceae
Gymnospermae
Libocedrus
Magnoliophyta
Papuacedrus
Papuacedrus papuana
Zamaloa, María del Carmen
Gandolfo, María Alejandra
Cúneo, Nestor Rubén
Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
topic_facet Austrocedrus
Cupressaceae
Eocene
Laguna del Hunco
Libocedrus
Paleoclimate
Papuacedrus
Patagonia
Río Pichileufú
Subtropical rainforest
biogeographical region
biome
coniferous tree
Eocene
fossil record
Gondwana
new record
paleobotany
paleoclimate
phytogeography
rainforest
steppe
type locality
Patagonia
South America
Austrocedrus
Austrocedrus chilensis
Cupressaceae
Gymnospermae
Libocedrus
Magnoliophyta
Papuacedrus
Papuacedrus papuana
description The 51.9 Ma Laguna del Hunco (LH) and 47.5 Ma Rí o Pichileuf ú (RP) floras from Patagonia, Argentina are unusually rich, angiosperm-dominated assemblages with living relatives in the low-latitude West Pacific, neotropics, and temperate southern latitudes. The diverse gymnosperms in these floras are important for Gondwanan biogeographic history and paleoclimatic interpretations. "Libocedrus" prechilensis Berry 1938 (Cupressaceae), previously known only from the holotype (RP), a vegetative branch, is revised here based on new material from both localities, including a seed cone attached to a shoot with cuticle (LH). Characters of these fossils are diagnostic of monotypic Papuacedrus (highlands of New Guinea and Moluccas). Living P. papuana is most abundant in cloud forests receiving up to 4 m rainfall annually, whereas Austrocedrus (Libocedrus) chilensis, the basis of comparison when the fossil species was named, inhabits dry, cold steppe margins to mediterranean climates in southern South America. We establish Papuacedrus prechilensis comb. nov., which simultaneously invalidates a southern South American connection for the fossil floras and reveals a link to West Pacific montane rainforests. Combined evidence indicates a biome similar to extant subtropical, or tropical montane, rainforests that persisted for at least 4.4 Myr, linking elevated floral richness to abundant rainfall.
author Zamaloa, María del Carmen
Gandolfo, María Alejandra
Cúneo, Nestor Rubén
author_facet Zamaloa, María del Carmen
Gandolfo, María Alejandra
Cúneo, Nestor Rubén
author_sort Zamaloa, María del Carmen
title Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
title_short Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
title_full Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
title_fullStr Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
title_full_unstemmed Papuacedrus (Cupressaceae) in Eocene Patagonia: A new fossil link to Australasian rainforests
title_sort papuacedrus (cupressaceae) in eocene patagonia: a new fossil link to australasian rainforests
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029122_v96_n11_p2031_Wilf
http://hdl.handle.net/20.500.12110/paper_00029122_v96_n11_p2031_Wilf
work_keys_str_mv AT zamaloamariadelcarmen papuacedruscupressaceaeineocenepatagoniaanewfossillinktoaustralasianrainforests
AT gandolfomariaalejandra papuacedruscupressaceaeineocenepatagoniaanewfossillinktoaustralasianrainforests
AT cuneonestorruben papuacedruscupressaceaeineocenepatagoniaanewfossillinktoaustralasianrainforests
_version_ 1768545904492544000

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