Palynoflora from the La Anita Formation (Maastrichtian), Austral-Magallanes Basin, Argentina

Patricio Emmanuel Santamarina, Viviana Dora Barreda, Damián Moyano Paz, Camila Tettamanti, Ari Iglesias, Daniel Poire, Augusto Nicolás Varela

Resumen


Here we describe the spore and pollen assemblages recovered from the La Anita Formation, Late Cretaceous, Austral-Magallanes Basin (~50°S). This unit shows a high diversity of spores, with subordinate gymnosperms (mainly represented by Podocarpaceae) and angiosperms (mainly represented by Proteaceae and Arecaceae). The abundance of these groups varies between the two fertile studied levels, being one dominated by ferns (mainly Cyathidites minor and Laevigatosporites ovatus) and the other by gymnosperm (Podocarpidites spp.). The presence of aquatic ferns (Azollopsis), diverse Podocarpaceae and key angiosperm taxa (such as Arecipites, Clavatipollenites, Dichastopollenites, and Spinizonocolpites) is indicative of warm and hyper-humid conditions. The great abundance of Arecaceae and the presence of some key taxa (e.g. Azollopsis sp., Ericipites scabratus, Peninsulapollis gillii, Proteacidites spp.) support a probable Maastrichtian age for the uppermost strata of the La Anita Formation. A multivariate statistical analysis here conducted showed that the La Anita Formation has its greatest similarity with the La Irene Formation (Maastrichtian from the Austral-Magallanes Basin). Both formations are also related with other coeval palynofloras from Patagonia and Antarctica.


Palabras clave


Late Cretaceous; Austral-Magallanes Basin; Patagonia; palynology

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Referencias


Archangelsky, S. 1973. Palinología del Paleoceno de Chubut. 1. Descripciones sistemáticas. Ameghiniana 10(4): 339–399.

Askin, R.A. 1990a. Cryptogam spores from the upper Campanian and Maastrichtian of Seymour Island, Antarctica. Micropaleontology 36(2): 141–156.

Askin, R.A. 1990b. Campanian to Paleocene spore and pollen assemblages of Seymour Island, Antarctica. Review of Palaeobotany and Palynology 65(1–4): 105–113.

Askin, R.A. 1994. Monosulcate angiosperm pollen from the López de Bertodano Formation (upper Campanian–Maastrichtian–Danian) of Seymour island, Antarctica. Review of Palaeobotany and Palynology 81(2–4): 151–164.

Askin, R.A. & A.M. Baldoni. 1998. The Santonian through Paleogene record of Proteaceae in the southern South America-Antarctic Peninsula region. Australian Systematic Botany 11: 373–390.

Baldoni, A.M. 1992. Palynology of the lower Lefipan Formation (Upper Cretaceous) of Barranca de Los Perros, Chubut Province, Argentina. Part I. Cryptogam spores and gymnosperm pollen. Palynology 16(1): 117–136.

Baldoni, A.M. & R.A. Askin. 1993. Palynology of the lower Lefipan Formation (Upper Cretaceous) of Barranca de los Perros, Chubut Province, Argentina, Part II. Angiosperm pollen and discussion. Palynology 17: 241–264.

Baldoni, A.M. & V.D. Barreda. 1986. Estúdio palinológico de las formaciones López de Bertodano y sobral, Isla Vicecomodoro Marambio, Antártida. Boletim IG-USP. Série Científica 17: 89–96.

Barreda V.D., N.R. Cúneo, P. Wilf, E.D. Currano, R.A. Scasso, et al. 2012. Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in diversity, low extinction, and a Classopollis spike. PLoS ONE 7(12): e52455.

Barreda, V.D., L. Palazzesi & E.B. Olivero. 2019. When flowering plants ruled Antarctica: evidence from Cretaceous pollen grains. New Phytologist 223(2): 1023–1030.

Bianchi, J.L. 1967. Informe preliminar acerca de los perfiles estratigráficos realizados en el sector occidental de la Cuenca Austral, durante las campañas 1964–65 y 1965–66. Inedit report of Yacimientos Petrolíferos Fiscales (YPF).

Bowman, V.C., J.E. Francis, R.A. Askin, J.B. Riding & G.T. Swindles. 2014. Latest Cretaceous–earliest Paleogene vegetation and climate change at the high southern latitudes: palynological evidence from Seymour Island, Antarctic Peninsula. Palaeogeography, Palaeoclimatology, Palaeoecology 408: 26–47.

Cantrill D.J. & I. Poole. 2005. Taxonomic turnover and abundance in Cretaceous to Tertiary wood floras of Antarctica: implications for changes in forest ecology. Palaeogeography,

Dettmann, M. E. & M.R.A. Thomson. 1987. Cretaceous palynomorphs from the James Ross Island area, Antarctica-a pilot study. British Antarctic Survey Bulletin 77: 13–59.

Dolding, P.J. 1992. Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island. Antarctic Science 4(3): 311–326.

Friis E.M., P.R. Crane & K.R. Pedersen. 2011. Early flowers and angiosperm evolution. Cambridge University Press.

Hammer, Ø., D.A.T. Harper & P.D. Ryan. 2001. Paleontological statistics software: package for education and data analysis. Palaeontologia Electronica (4): 1–9.

Heywood, V.H., R.K. Brummitt, A. Culham & O. Seberg. 2007. Flowering plant families of the world. Firefly Books Ltd., 424 pp.

Kraemer, P.E. & A.C. Riccardi. 1997. Estratigrafía de la region comprendida entre los lagos Argentino y Viedma (49° 40’ – 50° 10’ LS), Provincia de Santa Cruz. Revista de la Asociación Geológica Argentina 52: 333–360.

Lupia R, S. Lidgard & P.R. Crane. 1999. Comparing palynological abundance and diversity: implications for biotic replacement during the Cretaceous angiosperm radiation. Paleobiology 25: 305–340.

Macellari, C.E., C.A. Barrio & M.J. Manassero. 1989. Upper Cretaceous to Paleocene depositional sequences and sandstone petrography of southwestern Patagonia (Argentina and Chile). Journal of South American Earth Science 2(3): 223–239.

Martínez, L.C., S. Archangelsky, M. B. Prámparo, & A. Archangelsky. 2016. Early Cretaceous palm pollen tetrads from Patagonia, Argentina. Cretaceous Research 59: 129–139.

Moyano Paz, D., C. Tettamanti, A.N. Varela, A. Cereceda & D.G. Poiré. 2019. Depositional processes and stratigraphic evolution of the Campanian deltaic system of La Anita Formation, Austral-Magallanes Basin, Patagonia, Argentina. Latin American Journal of Sedimentology and Basin Analysis 25(2): 69–92.

Nagalingum N.S., A.N. Drinnan, R. Lupia, S. McLoughlin. 2002. Fern spore diversity and abundance in Australia during the Cretaceous. Review of Palaeobotany and Palynology 119: 69–92.

Novas, F., F. Agnolin, S. Rozadilla, A. Aranciaga-Rolando, F. Brissón-Eli, M. Motta, et al. 2019. Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina. Revista del Museo Argentino de Ciencias Naturales nueva serie 21(2):217-293.

Papú, O.H. 1988a. Estudio palinológico de la Formación Paso del Sapo (Cretácico Superior) en la localidad de ‘‘Los Fortines’’, valle medio del Río Chubut. Parte 1: Esporas triletes Laevigati y Apiculati. 4° Congreso Argentino de Paleontología y Bioestratigrafía, Actas 3: 63–73.

Papú, O.H. 1988b. Estudio palinológico de la Formación Paso del Sapo (Cretácico Superior) en la localidad de ‘‘Los Fortines’’, valle medio del Río Chubut. Parte 2: Esporas triletes Murornati, Tricrassati y esporas monoletes. 4° Congreso Argentino de Paleontología y Bioestratigrafía, Actas 3: 75–85.

Papú, O.H. 1989. Estudio palinológico de la Formación Paso del Sapo (Cretácico superior), valle medio del Río Chubut. Granos de polen, consideraciones estadísticas, paleoecológicas y paleoambientales. Ameghiniana 25(3): 193–202.

Papú, O.H. 2002. Nueva microflora de edad Maastrichtiana en la localidad de Calmu-Co, sur de Mendoza, Argentina. Ameghiniana 39: 415–426.

Papú, O.H. & E.G. Sepúlveda. 1995. Datos palinológicos de la Formación Los Alamitos en la localidad de Montoniló, departamento 25 de Mayo, Río Negro, Argentina. Sus relaciones con unidades colindantes coetáneas. 6º Congreso Argentino de Paleontología y Bioestratigrafía (Trelew), Actas: 195–200.

Povilauskas, L. 2010. Palinología del entorno Cretácico - Paleógeno de SW de la Provincia de Santa Cruz. Significado estratigráfico y paleoambiental. Ph.D. thesis (unpublished), Universidad Nacional de La Plata, Argentina.

Povilauskas, L. 2011. Palinología de la Formación Monte Chico (Cretácico tardío) de la Provincia de Santa Cruz, Argentina: Esporas. Revista Brasileira de Paleontologia 14: 255–268.

Povilauskas, L. 2012. Palinología de la Formación Monte Chico (Cretácico Tardío) de la Provincia de Santa Cruz, Argentina: granos de polen de gimnospermas. Revista Brasileira de Paleontología 15(1): 85–94.

Povilauskas, L. 2013. Palinología de angiospermas de la Formación Monte Chico (Cretácico Superior) de la Provincia de Santa Cruz, Argentina. Revista Brasileira de Paleontología 16(1): 115–126.

Povilauskas, L. 2016. Estudio palinológico de la Formación Cerro Cazador (Cretácico Tardío) de la Provincia de Santa Cruz, Argentina. Revista Brasileira de Paleontologia 19(1): 71–84.

Povilauskas, L., V. Barreda & S. Marenssi. 2008. Pollen and spores of the La Irene Formation (Maastrichtian), Southwestern Santa Cruz Province: First results. Geobios 41: 819–831.

Riccardi, A.C. 1983. Informe paleontológico de los perfiles Estancia Alta Vista, Arroyo El Turbio. Inedit report of Yacimientos Petrolíferos Fiscales (YPF).

Riccardi, A.C. & E.O. Rolleri. 1980. Cordillera Patagónica Austral. In: J.C.M. Turner (Ed.), Segundo Simposio de Geología Regional Argentina. Academia Nacional de Ciencias, Córdoba, vol. 2: 1173–1304.

Sickmann, Z.T., T.M. Schwartz & S.A. Graham. 2018. Refining stratigraphy and tectonic history using detrital zircon maximum depositional age: an example from the Cerro Fortaleza Formation, Austral Basin, southern Patagonia. Basin Research 30(4): 708–729.

Sickmann, Z.T., T.M. Schwartz, M.A. Malkowski, S.C. Dobbs & S.A. Graham. 2019. Interpreting large detrital geochronology data sets in retroarc foreland basins: An example from the Magallanes-Austral Basin, southernmost Patagonia. Lithosphere 11(5): 620-642.

Tettamanti, C., D. Moyano Paz, A.N. Varela, D.E. Tineo, L.E. Gómez-Peral, D.G. Poiré, A. Cereceda & A.L. Odino Barreto. 2018. Sedimentology and fluvial styles of the Uppermost Cretaceous Continental Deposits of the Austral-Magallanes Basin, Patagonia, Argentina. Latin American Journal of Sedimentology and Basin Analysis 25(2): 149-168.

Tryon, A.F. & B. Lugardon. 2012. Spores of the Pteridophyta: surface, wall structure, and diversity based on electron microscope studies. Springer Science & Business Media, New York, 648 pp.

Vallati, P. 2010. Asociaciones palinológicas con angiospermas en el Cretácico Superior de la Cuenca Neuquina, Argentina. Revista Brasileira de Paleontologia 13(2): 143–158.

van Geel, B. 1976. Fossil spores of Zygnemataceae in ditches of a pre-historic settlement in Hoogkarspel (The Netherlands). Review of Palaeobotany and Palynology 22(4): 337–344.

Volkheimer, W., L. Scafati & D.L. Melendi. 2007. Palynology of a Danian warm climate wetland in central northern Patagonia, Argentina. Revista Española de Micropaleontología 39(1–2): 117–134.


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