Carboniferous brachiopods (Productida and Orthotetida) from Santiago Ixtaltepec, Oaxaca, Southern Mexico

Abstract

-Ten species of Carboniferous brachiopods of the orders Productida and Orthotetida are described. The material occurs in Santiago Ixtaltepec, considered as one of the most important regions where Paleozoic rocks of Mexico are exposed. Ozora sp., Tolmatchoffia keokuk and Marginatia sp. were found in rocks from the Santiago Formation (APS-1), meanwhile the other taxa were collected in different strata from the Ixtaltepec Formation (API-2, API-5, API-6 and API-7). The record of the genera Ozora and Marginatia and the species Tolmatchoffia keokuk corroborate the Tournaisian-Visean age for the Lower Member of the Santiago Formation. The presence of Productus concinnus at API-2 level of the Ixtaltepec Formation places it in at least Visean age. Antiquatonia sp., Orthotetes mixteca, Derbyia sp. and ?Schuchertella sp. were found in previously dated Pennsylvanian strata . The fossil associations and the lithology allowed to relate each level where brachiopods were found with an intertidal, subtidal or peri-reef paleoenvironment. The presence of typical taxa from the Tournaisian of the Mid-Continent (United States) in the Santiago Ixtaltepec region suggests that there was a marine connection that joined both areas at least since the Early Mississippian. The occurrence of Productus concinnus in the Ixtaltepec Formation (API-2) confirms that Europe and Santiago Ixtaltepec region were linked during the Middle Mississippian. Antiquatonia, Orthotetes, Derbyia and Schuchertella are considered as cosmopolite genera whose presence in localities from the Mid-Continent is very common. Keywords

Invertebrados (Echinodermata, Brachiopoda, Bryozoa, Cnidaria, Porifera) del Carbonífero de Sierra Santa Teresa, Sonora, México: Consideraciones paleoecológicas y paleogeográficas

“…Los briozoos fenestélidos de la especie A. stoyanowi del Chesteriano de la sierra Santa Teresa se han descrito anteriormente para la Formación Paradise en Arizona, Estados Unidos de Norteamérica (Condra & Elias, 1944). El braquiópodo Antiquatonia reportado para el Morrowano-Atokano de la Sierra Santa Teresa, se ha considerado como un género cosmopolita que se encuentra en distintas localidades de la región del Mid-Continent durante el Carbonífero (Torres-Martínez et al, 2018). Sobre los registros de crinoideos descritos para el Carbonífero de México es importante tomar en cuenta que presentan asociaciones con diversos organismos que vivieron en los mares tropicales y someros de distribución tethysiana entre estos, algas incrustantes y filoides (Eugonophyllum, Kamaena, Zidella), foraminíferos fusulínidos (Triticites, Fusulinella) típicos de la región del Mid-Continent que son similares a la biota de la Provincia Euroasiática-Ártica, también asociados a corales (Lophophyllidium, Neozaphrentis, Caninophyllum, Cyathaxinia, Lithostrotionella) citados para la provincia Cordillerana en América del Norte y para la provincia Euroasiática, en asociación con braquiópodos (Avonia, Wellerella, Composita, Hustedia), trilobites (Griffithides) y conodontos Buitrón-Sánchez et al, 2008).…”

Coevolution of global brachiopod palaeobiogeography and tectonopalaeogeography during the Carboniferous

“…It has been suggested in several works that there is a strong affinity among the Mississippian brachiopods of Mexico and coeval faunas from the central and southeastern United States (Navarro-Santillán et al 2002;Sour-Tovar et al 2005;Torres-Martínez et al 2018), and this similarity increases with the age of the faunas (Torres-Martínez et al 2018). Anthracospirifer and Flexaria from the Tournaisian-Visean…”

“…California (Watkins 1974); 11. central United States (Weller 1905(Weller , 1914Carter 1968Carter , 1972; 12. southwestern United States (Carter 1967);13. Mexico (Navarro-Santillán et al 2002;Sour-Tovar et al 2005;Torres-Martínez et al 2018); 14. Madama (Mergl et al 2001); 15.…”

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

“…Schuchertella sp. (Sour-Tovar and Quiroz-Barroso, 1989; Torres-Martínez et al, 2018), while in the Order Spiriferida are Neospirifer dunbari King, 1933, Neospirifer pantojai Torres-Martínez, Sour-Tovar, and Pérez-Huerta, 2008, Neospirifer amplia Torres-Martínez, Sour-Tovar, and Pérez-Huerta, 2008, Septospirifer mazateca Torres-Martínez, Sour-Tovar, and Pérez-Huerta, 2008, and ? Septospirifer sp.…”

“…Sinuatella sp. from the Superfamily Aulostegoidea (Sour-Tovar and Martínez-Chacón, 2004; Torres-Martínez and Sour-Tovar, 2012, 2016a, 2018; Torres-Martínez et al, 2018). In the Order Orthotetida are the species Orthotetes mixteca Sour-Tovar and Quiroz-Barroso, 1989, Derbyia sp., and ?…”