Presencia de Aseptella tse nov. sp. (Brachiopoda, Productida) en el Viseano (Misisípico Medio) de México, primer registro del género para Norteamérica
Presence of Aseptella tse nov. sp. (Brachiopoda, Productida) from the Visean (Middle Mississippian) of Mexico, first record of the genus for North America
Francisco Sour-Tovar1,*, Sara Alicia Quiroz-Barroso1, Karla María Castillo-Espinoza1
1 Museo de Paleontología, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, CDMX, México.
Autor para correspondencia: (F. Sour-Tovar) This email address is being protected from spambots. You need JavaScript enabled to view it.
How to cite this article:
Sour-Tovar, F., Quiroz-Barroso, S.A., Castillo- Espinosa, K.M., 2025, Presencia de Aseptella tse nov. sp. (Brachiopoda, Productida) en el Viseano (Misisípico Medio) de México, primer registro del género para Norteamérica: Boletín de la Sociedad Geológica Mexicana, 77(2), A010325. http://dx.doi.org/10.18268/BSGM2025v77n2a010325
Manuscript received: December 9, 2024; Corrected manuscript received: February 10, 2025; Accepted manuscript: February 20, 2025.
ABSTRACT
The presence of the brachiopod Aseptella tse nov. sp. is reported in Visean (Middle Mississippian) strata outcropping in the Santiago Ixtaltepec region, Nochixtlán Municipality, in the northern part of the State of Oaxaca. This discovery represents the oldest record of the genus Aseptella globally and the first from North America. Previously, it was only known from localities in Europe (Spain), South America (Argentina), and Southeast Asia (Thailand). Since Aseptella exhibits a cosmopolitan distribution pattern, its presence in Mexico, together with other taxa reported from the same localities, infers the existence of paleobiogeographic connections between the regions where it has been found throughout the Carboniferous. Specifically, its presence in North and South America is explained by a model in which the southeastern margins of Baltica and the northwestern margins of Gondwana gradually moved closer together due to Continental Drift, becoming connected by shallow seas during the glacial event known as the Late Paleozoic Ice Age (LPIA), which occurred during the Mississippian-Pennsylvanian.
Keywords: Brachiopoda, Aseptella, Mississippian, Oaxaca, Mexico.
