Pennsylvanian biota of the Sierra Agua Verde, Sonora, Mexico: Biostratigraphic and paleogeographic considerations
Por:
Buitrón-Sánchez B.E., Chacón-Wences O., Vachard D., Palafox-Reyes J.J., Jiménez-López J.C., Sour-Tovar F.
Publicada:
1 ene 2015
Categoría:
Ecology, evolution, behavior and systematics
Resumen:
The marine biota from the middle Pennsylvanian outcrops of the Sierra Agua Verde, located in mid-eastern Sonora, consists of phylloid algae of the genera Komia and Eugonophyllum and a number of invertebrates. These species include bioaccumulations of chaetetids; brachiopods of the genera Dielasma sp., Reticulariina sp., Anthracospirifer sp., Antiquatonia sp.; bryozoans of the genus Thamniscus; tabulate corals such as Syringopora and solitary corals such as Zaphrentis; fusulinid foraminifera such as Pseudostaffella, Eoshubertella texana, Fusulinella llanoensis, and Zellerella; gastropods of the genus Euomphalus and Donaldina; and the crinoid genera Cyclocaudex, Cyclocrista, Heterosteleschus, Lamprosterigma, Mooreanteris, Pentagonopternix, Preptopremium, Cycloscaspus, and Pentaridica. The material was collected from outcrops in the first 512 m of the La Joya Formation, and their sediments have a total thickness of 780 m and consist of limestone interbedded with calcareous mudstone and sandstone lenses. The age of the middle Pennsylvanian strata corresponds to that of the Atokan stage (311 million years). The species assemblages are typical of a shallow tropical marine benthos. The analysis of the distribution of the species allowed for the determination of their paleogeographic relationships with the components of the biota of the Carboniferous strata of Texas and Kansas in the United States of America, which belong to the province of the North American Craton. © 2015 Universidad Nacional Autónoma de México, Instituto de Biología. All Rights Reserved.
Filiaciones:
Buitrón-Sánchez B.E.:
Departamento de Paleontología, Instituto de Geología, Universidad Nacional Autónoma de México, Delegación Coyoacán, México, D.F. 04510, Mexico
Chacón-Wences O.:
División de Ingeniería en Ciencias de la Tierra, Facultad de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, Delegación Coyoacán, México, D.F. 04510, Mexico
Vachard D.:
Université Lille 1, UMR 8217 Géosystèmes, Villeneuve d'Ascq Cédex, 59655, France
Palafox-Reyes J.J.:
Departamento de Geología, Universidad de Sonora, Boulevard Luis Encinas y Rosales s/n, Col. Centro, Hermosillo, Sonora 83000, Mexico
Jiménez-López J.C.:
Posgrado de Ciencias de la Tierra, Universidad Nacional Autónoma de México. Cd. Universitaria, Delegación Coyoacán, México, D.F. 04510, Mexico
Sour-Tovar F.:
Museo de Paleontología, Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Delegación Coyoacán, México, D.F. 04510, Mexico
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