New Fossil Rodents from the Early Oligocene Rancho Gaitan Local Fauna, Early Chadronian, Northeastern Chihuahua, Mexico
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One new genus and three new species of rodents are described from the early Oligocene of Chihuahua. Mytonomys gaitania is a paramyid slightly more advanced than species from the late Eocene of Utah and California. Jaywilsonomys, new genus, with two new species, is a cvlindrodont apparently descended from the late Eocene Pareumys. The Chihuahua deposits are probably slightly later than the late Eocene Mvton of Utah and probably appreciably earlier than the early Oligocene Capote Mountain Tuff of Trans- Pecos Texas.
Contents: Abstract -- Introduction -- Paramyidae -- Cylindrodontidae -- References Cited