New rhynchonellid and spire-bearing brachiopods from the Carboniferous of Mexico. Paleogeographical significance of the Oaxacan brachiopod fauna through the Serpukhovian–Moscovian

Abstract This work describes a rhynchonellid and spire-bearing brachiopod fauna from the Ixtaltepec Formation of Oaxaca, Mexico. Leiorhynchoidea perrilliatae , Allorhynchus scientiana Anthracospirifer oaxacaensis are new species. The specific determination, along with information previously described taxa, allowed establishment precise relative ages different fossiliferous intervals (API-1 to API-8) formation. occurrence Serpukhovian taxa in API-1 API-3 assignment strata Upper Mississippian. presence Bashkirian species rocks API-5 API-6 Lower Pennsylvanian. Likewise, Middle Pennsylvanian brachiopods API-7 API-8 enabled correlation Moscovian stage. study shows that is represented by succession well-delimited Serpukhovian, Bashkirian, rocks. Regarding paleogeography, displays clear taxonomic variations concur global geological changes occurred between Moscovian. In intervals, we recorded numerous cosmopolitan tropical waters, coinciding migration pathway Rheic Ocean. For observed North American provincialism; however, because Australian South species, it proposed Austropanthalassic-Rheic corridor had close connection Oaxaca. main provincialism was association most those have been reported localities United States. supports resemblance Oaxacan faunas continued until not Mississippian, as proposed. UUID: http://zoobank.org/181e49cf-a08a-4e99-8200-65f4a90dafcd