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Abstract:

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.

Registro:

Documento: Artículo
Título:Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids
Autor:Gallego, J.; Gandolfo, M.A.; Rubén Cúneo, N.; Zamaloa, M.C.
Filiación:MEF-ANCYPT, Av. Fontana 140, Trelew, Chubut, Argentina
L.H. Bailey Hortorium, Department of Plant Biology, Cornell University, 412 Mann Library Building, Ithaca, NY 14853, United States
MEF-CONICET., Av. Fontana 140, Trelew, Chubut, 9100, Argentina
Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IEGEBA-CONICET, Intendente Güiraldes 2620, Buenos Aires, C1428EHA, Argentina
Palabras clave:Araceae; Argentina; Fossil leave; Phylogeny; Systematics; Upper Cretaceous; fossil record; Maastrichtian; monocotyledon; morphology; phylogeny; pollen; Southern Hemisphere; Patagonia; Araceae
Año:2014
Volumen:211
Página de inicio:78
Página de fin:86
DOI: http://dx.doi.org/10.1016/j.revpalbo.2014.08.017
Título revista:Review of Palaeobotany and Palynology
Título revista abreviado:Rev. Palaeobot. Palynol.
ISSN:00346667
CODEN:RPPYA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346667_v211_n_p78_Gallego

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Citas:

---------- APA ----------
Gallego, J., Gandolfo, M.A., Rubén Cúneo, N. & Zamaloa, M.C. (2014) . Fossil Araceae from the Upper Cretaceous of Patagonia, Argentina, with implications on the origin of free-floating aquatic aroids. Review of Palaeobotany and Palynology, 211, 78-86.
http://dx.doi.org/10.1016/j.revpalbo.2014.08.017
---------- CHICAGO ----------
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" . Review of Palaeobotany and Palynology 211 (2014) : 78-86.
http://dx.doi.org/10.1016/j.revpalbo.2014.08.017
---------- MLA ----------
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" . Review of Palaeobotany and Palynology, vol. 211, 2014, pp. 78-86.
http://dx.doi.org/10.1016/j.revpalbo.2014.08.017
---------- VANCOUVER ----------
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. Rev. Palaeobot. Palynol. 2014;211:78-86.
http://dx.doi.org/10.1016/j.revpalbo.2014.08.017