Articles

 

Boletín de la Sociedad Geológica Mexicana

Volumen 70, núm. 3, 2018, p. 797 - 807

http://dx.doi.org/10.18268/BSGM2018v70n3a12
Nota corta

 

 Presencia de Plagiobrissus grandis (Gmelin, 1788) (Echinoidea: Spatangoida) en la Formación Tuxpan, Mioceno (Langhiano) del norte del Estado de Veracruz, México. Consideraciones Biogeográficas

Francisco Sour-Tovar1, Sara Alicia Quiroz-Barroso1, Miguel Ángel Torres-Martínez2

1Museo de Paleontología, Departamento de Biología Evolutiva, Facultad de Ciencias, Uni­versidad Nacional Autónoma de México, Ciu­dad Universitaria, 04510 CDMX, México. 
2Departamento de Paleontología, Instituto de Geología, Universidad Nacional Autóno­ma de México, Ciudad Universitaria, 04510, CDMX, México.

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Abstract

The presence of Plagiobrissusgrandis is reported in a locality of the middle Miocene (Langhiano) of the Tuxpan Formation in the Papantla-Martínez de la Torre region, North of Veracruz. The finding allows to analyze the space-time distribution of the genus, and corroborates its origin in the Caribbean during Eocene times, as well as its later dispersion during the Miocene to North Carolina in the United States and the coasts of Venezuela and Brazil. The divi­sion of the Pacific and the Atlantic oceans during the Miocene-Pliocene, by the emer­gence of the Panama Isthmus, triggered great changes in the marine currents of the North Atlantic; that event favored the dispersion of the genus from the Miocene to the Recent towards the Mediterranean and the coasts of North Africa, to the Gulf of Guinea. The finding of Plagiobrissusgrandis in the middle Miocene and its survival until the present provides an example of the longevity of several echinoid species.

Keywords: Miocene, Plagiobrissusgrandis, Spatangoida, Tuxpan Formation, Veracruz, Mexico.