Pennsylvanian biota of the Sierra Agua Verde, Sonora, Mexico: Biostratigraphic and paleogeographic considerations

Blanca E. Buitrón-Sánchez*, Omar Chacón-Wences, Daniel Vachard, Juan José Palafox-Reyes, José Carlos Jiménez-López, Francisco Sour-Tovar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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.

Original languageEnglish
Pages (from-to)521-527
Number of pages7
JournalRevista Mexicana de Biodiversidad
Issue number2
StatePublished - 1 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 Universidad Nacional Autónoma de México, Instituto de Biología. All Rights Reserved.


  • Carboniferous
  • NW sonora
  • Pennsylvanian
  • Upper Paleozoic


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