Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids

Herein, we describe and name a new fossil genus and species, Aquaephyllum auriculatum, and report on the presence of Pandaniidites pollen grains from La Colonia Formation (Maastrichtian, Upper Cretaceous), Patagonia, Argentina. The new fossil taxon is based on leaf impressions and is morphologically...

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Autores principales: Gallego, J., Gandolfo, M.A., Rubén Cúneo, N., Zamaloa, M.C.
Formato: JOUR
Materias:
Araceae
Argentina
Fossil leave
Phylogeny
Systematics
Upper Cretaceous
fossil record
Maastrichtian
monocotyledon
morphology
phylogeny
pollen
Southern Hemisphere
Patagonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00346667_v211_n_p78_Gallego
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00346667_v211_n_p78_Gallego
record_format dspace
spelling todo:paper_00346667_v211_n_p78_Gallego2023-10-03T14:46:01Z Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids Gallego, J. Gandolfo, M.A. Rubén Cúneo, N. Zamaloa, M.C. Araceae Argentina Fossil leave Phylogeny Systematics Upper Cretaceous fossil record Maastrichtian monocotyledon morphology phylogeny pollen Southern Hemisphere Patagonia Araceae Herein, we describe and name a new fossil genus and species, Aquaephyllum auriculatum, and report on the presence of Pandaniidites pollen grains from La Colonia Formation (Maastrichtian, Upper Cretaceous), Patagonia, Argentina. The new fossil taxon is based on leaf impressions and is morphologically similar to members of the family Araceae, subfamily Lemnoideae. The most important morphological characters comprise the adaxial venation with at least eight primary veins, the crenate margin, and the presence of an auricle with a floating function. Phylogenetic analysis places the new taxon in a close relationship within the subfamily Lemnoideae, which also includes the fossils Limnobiophyllum scutatum, Cobbania corrugata, and the extant Pistia stratiotes. Aquaephyllum auriculatum and Pandaniidites are the first fossil record of lemnaceous leaves and the oldest record for Pandaniidites pollen for the Southern Hemisphere respectively. The inclusion of Aquaephyllum and Pandaniidites within a phylogenetic context confirms the previously suggested hypothesis on the existence of close relationships between modern Pistia, and the fossils Limnobiophyllum and Cobbania. © 2014. Fil:Gandolfo, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rubén Cúneo, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zamaloa, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00346667_v211_n_p78_Gallego
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Araceae
Argentina
Fossil leave
Phylogeny
Systematics
Upper Cretaceous
fossil record
Maastrichtian
monocotyledon
morphology
phylogeny
pollen
Southern Hemisphere
Patagonia
Araceae
spellingShingle Araceae
Argentina
Fossil leave
Phylogeny
Systematics
Upper Cretaceous
fossil record
Maastrichtian
monocotyledon
morphology
phylogeny
pollen
Southern Hemisphere
Patagonia
Araceae
Gallego, J.
Gandolfo, M.A.
Rubén Cúneo, N.
Zamaloa, M.C.
Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
topic_facet Araceae
Argentina
Fossil leave
Phylogeny
Systematics
Upper Cretaceous
fossil record
Maastrichtian
monocotyledon
morphology
phylogeny
pollen
Southern Hemisphere
Patagonia
Araceae
description Herein, we describe and name a new fossil genus and species, Aquaephyllum auriculatum, and report on the presence of Pandaniidites pollen grains from La Colonia Formation (Maastrichtian, Upper Cretaceous), Patagonia, Argentina. The new fossil taxon is based on leaf impressions and is morphologically similar to members of the family Araceae, subfamily Lemnoideae. The most important morphological characters comprise the adaxial venation with at least eight primary veins, the crenate margin, and the presence of an auricle with a floating function. Phylogenetic analysis places the new taxon in a close relationship within the subfamily Lemnoideae, which also includes the fossils Limnobiophyllum scutatum, Cobbania corrugata, and the extant Pistia stratiotes. Aquaephyllum auriculatum and Pandaniidites are the first fossil record of lemnaceous leaves and the oldest record for Pandaniidites pollen for the Southern Hemisphere respectively. The inclusion of Aquaephyllum and Pandaniidites within a phylogenetic context confirms the previously suggested hypothesis on the existence of close relationships between modern Pistia, and the fossils Limnobiophyllum and Cobbania. © 2014.
format JOUR
author Gallego, J.
Gandolfo, M.A.
Rubén Cúneo, N.
Zamaloa, M.C.
author_facet Gallego, J.
Gandolfo, M.A.
Rubén Cúneo, N.
Zamaloa, M.C.
author_sort Gallego, J.
title Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
title_short Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
title_full Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
title_fullStr Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
title_full_unstemmed Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
title_sort fossil araceae from the upper cretaceous of patagonia, argentina, with implications on the origin of free-floating aquatic aroids
url http://hdl.handle.net/20.500.12110/paper_00346667_v211_n_p78_Gallego
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AT zamaloamc fossilaraceaefromtheuppercretaceousofpatagoniaargentinawithimplicationsontheoriginoffreefloatingaquaticaroids
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