A new Miocene local fauna from the Sierra Madre Oriental at San Luis Potosí, Central-East Mexico, and its paleontologic significance

Ferrusquía-Villafranca, Ismael; Ruiz-González, José E.; Martínez‐Hernández, Enrique; Torres-Hernández, José Ramón; Woolrich-Piña, Guillermo A.

doi:10.1016/j.geobios.2014.06.004

Cited by 8 publications

(8 citation statements)

References 20 publications

(27 reference statements)

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“…The fossil horse sample from Escobedo comes from a fossil-bearing unit that underlies a sequence of andesitic lava flows Ar 40 /Ar 39 dated 12.2 ± 04-10.6 ± 0.3 (Robles-Rivera, 2015). The fossil-bearing strata of El Paso de Águila are part of the San Nicolas Formation, whose age is bracketed between 12.33 and 7.41 Ma by the Ar 40 /Ar 39 dating of volcanic ashes above and below the fossiliferous strata (Ferrusquía-Villafranca et al, 2014).…”

Section: Clarendonian Mexican Horsesmentioning

confidence: 99%

“…A rostral fragment has been assigned to a new species named as Pliohippus potosinus from El Paso del Águila, San Luis Potosí (Ferrusquía-Villafranca et al, 2014). This species is only known from the Mexican territory, exhibiting a cranial and dental configuration similar to that of Pliohippus fossulatus from the Clarendonian of Texas (Kelly, 1998).…”

Section: Clarendonian Mexican Horsesmentioning

confidence: 99%

“…Most of what is known regarding the evolution of North American Equinae derives from the study of fossil samples recovered from numerous localities in the United States (MacFadden, 1984a(MacFadden, , 1992Hulbert, 1989;Hulbert and MacFadden, 1991;Kelly, 1995Kelly, , 1998Maguire and Stigall, 2008). A small number of studies have considered Mexican samples in order to understand evolutionary aspects of some members of Equinae (e.g., MacFadden, 1984b;MacFadden and Carranza-Castañeda, 2002;Ferrusquía-Villafranca et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Evolutionary Significance of Equinae From the Mexican Neogene

Bravo-Cuevas

Jiménez-Hidalgo

2019

Front. Ecol. Evol.

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North American Equinae integrates a monophyletic clade that consists of about 20 genera and 80 species. This group includes horses with hypsodont cheek teeth belonging to the merychippines and the tribes Hipparionini, Protohippini, and Equini. The primary adaptive radiation and diversification of Equinae occurred in the Neogene period (23.03-2.53 Ma). In Mexico, 11 genera and 20 species of Neogene Equinae have been reported, which correspond to 55 and 28% of the generic and specific diversity in North America, respectively. The Mexican record exhibited their major diversity during the late Miocene (10 species) and evidences part of the evolutionary history of North American Equinae, as it is stated in the following considerations: (1) The presence of merychippine species from the late Hemingfordian-early Barstovian (18-15 Ma) of southern Mexico ("Merychippus" cf. primus and "M." cf. sejunctus) that are related with earliest representatives of Equinae in North America. (2) The occurrence of populations referable to Cormohipparion aff. quinni, Calippus sp., and Pliohippus sp. from the early-late Barstovian (15-14 Ma) of southern Mexico, which are synchronous with the first known appearances of those genera from the Great Plains and Gulf Coastal Plain in the United States. (3) The equine horse Dinohippus mexicanus from the late Hemphillian (4.8 Ma) of central and northern Mexico that is considered the closest sister species of primitive Equus. These records suggest that early differentiation of some hipparionines, protohippines, and equines may have had occurred also in areas of southern tropical North America during the middle Miocene; furthermore, the origin of primitive Equus could be traced from the Mexican record.

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Section: Clarendonian Mexican Horsesmentioning

confidence: 99%

Section: Clarendonian Mexican Horsesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolutionary Significance of Equinae From the Mexican Neogene

Bravo-Cuevas

Jiménez-Hidalgo

2019

Front. Ecol. Evol.

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“…We collected from fine-grained strata [floodplain facies] in several sites near Paso del Águila the small but significant namesake local fauna [Ferrusquía-Villafranca et al (2014)]; it includes [ Table 1] chelonian and mammalian remains [artiodactyls and perissodactyls]. The most important taxon is a new species of the grazing horse, Pliohippus potosinus.…”

Section: Fossil Contentmentioning

confidence: 99%

“…Kelly (1995, 1998), Ferrusquía-Villafranca et al (2014]. This biochronologic time span corresponds to the Late Miocene.…”

Section: Agementioning

confidence: 99%

A new Miocene Formation from The Peotillos-Tolentino Graben fill, Western Sierra Madre Oriental at San Luis Potosí, Mexico: Part 1, Geology

Ferrusquía-Villafranca

Ruiz-González

Torres-Hernández

et al. 2016

BSGM

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In spite of ~130 years of geologic research in Mexico, much remains pending e.g. only 1/3 of this country's territory is mapped in detail [i.e., scale 1:50000], the formal stratigraphic differentiation of the continental sedimentary Cenozoic is barely started, discriminating the depositional systems that make up basic units is even less pursued. Towards filling this gap, the detailed Cenozoic lithostratigraphy of a graben fill in central-east Mexico is reviewed, a new Miocene formation is proposed, and its importance in understanding the regional geologic evolution is discussed.The study area lies in San Luis Potosí State, within the Sierra Madre Oriental Morphotectonic Province [SMO], between 22°11'-22°19' N Lat. and 100°30'-100°39' W Long., and 1295 -2025 masl. The ~1200 m thick Tertiary sedimentary sequence is preserved in the N-S trending Peotillos-Tolentino Graben, which is bound by horsts of folded and faulted Cretaceous carbonate units; it includes a Paleogene volcanic succession formed by an andesitic-basaltic lavic stack intertongued/overlain by a rhyolitic ash flow-tuff sheet, which non-conformably underlies the new unit, a Late Miocene, ~1100 m thick, fluvio-lacustrine, largely calcilithitic, 15° -20° NE dipping, peneplained sequence, in turn unconformably overlain by a Quaternary, ~40 m thick, calcilithitic-volcarenitic blanket; locally overlain by mafic lavic/pyroclastic rocks.The new formation was deposited in a subsiding basin, under humid to subhumid conditions allowing erosion of large clastics volumes, and the development of an axial fluvial network, capable of transporting/depositing such volumes. Nevertheless, floodplain calcisols and calcretes indicate periods of dry conditions. The ~1100 m thick, largely fluvial stratal pile thus formed, records cyclic superimposing of such network's systems during Late Miocene time; this in turn, denotes stability of the tectono-sedimentary-climatic conditions. Subsequently, faulting, erosion and finally peneplanation took place. In the Quaternary, clastic sedimentation was reestablished.The holistic approach used to study the Peotillos-Tolentino Graben and its sedimentary fill, could be applied to the other post-orogenic basins of the Sierra Madre Oriental that bear Cenozoic clastic sequences, probably resulting from similar processes, to identify and characterize such processes, thus contributing to a better understanding of the Cenozoic geologic makeup and evolution of this province.Keywords: Mexico, Miocene, continental lithostratigraphy, depositional systems, tectono-sedimentary evolution, paleosols. Resumen

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