Abstract
This is the first detailed report of these authors on the Rancho El Ocote local fauna, from which the Neohipparion material is discussed. From this locality, Neohipparion otomii Mooser, 1959 and Neohipparion monias Mooser, 1963, were previously reported. An objective analysis however, shows that both species are junior sinonyms of Neohipparion floresi Stirton, 1955 from the Yepómera local fauna, middle Pliocene of Chihuahua State. The Neohipparion material from this collection is also referable to N. floresi, thus extending the geographic range of this species from the State of Chihuahua to the State of Guanajuato, in Central Mexico. Futhermore a discusión to clarify the nomenclatorial status of the genus Neohipparion in Mexico is enclosed.
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