| Hay O. P. On the nomenclature of certain American fossil vertebrates, The American Geologist 24, 345-349 |
| Matthew W. D., Stirton R. A. (1930) Equidae from the Pliocene of Texas, University of California Publications, Bulletin of the Department of Geological Sciences 19 17, 349-396 |
| Hesse C. J. (1936) A Pliocene Vertebrate Fauna From Optima, Oklahoma, University of California Publications, Bulletin of the Department of Geological Sciences 24 3, 57-70 |
| Hesse C. J. (1936) Lower Pliocene Vertebrate Fossils from the Ogallala Formation (Lavern Zone) of Beaver County, Oklahoma, Carnegie Institution of Washington Publication 476 1, 47-72 |
| Frick C. (1937) Horned ruminants of North America, Bulletin of the American Museum of Natural History 69, 1-669 |
| Savage D. E. (1941) Two New Middle Pliocene Carnivores from Oklahoma with Notes on the Optima Fauna, American Midland Naturalist 25 3, 692-710 doi:10.2307/2420725 |
| Hibbard C. W., Dunkle D. H. (1942) A New Species of Cyprinidontid Fish from the Middle Pliocene of Kansas, Kansas Geological Survey Bulletin 41 7 |
| Hibbard C. W. (1953) Equus (Asinus) Calobatus Troxell and Associated Vertebrates from the Pleistocene of Kansas, Transactions of the Kansas Academy of Sciences 56 1, 111-126 |
| Frye J. C., Leonard A. B., et al (1956) Stratigraphy of the Ogallala Formation (Neogene) of northern Kansas, State Geological Survey of Kansas Bulletin 118, 1-92 |
| Brodkorb P. (1962) A teal from the lower Pliocene Of Kansas, Quarterly Journal of the Florida Academy of Sciences 252 2, 157-160 |
| Stevens M. S. (1966) The Osteology and Relationships of the Pliocene ground squirrel, Citellus dotti Hibbard, from the Ogallala, Formation of Beaver County, Oklahoma, Pearce-Sellards Series 4 |
| Brattstrom B. H. (1967) A succession of Pliocene and Pleistocene snake faunas from the High Plains of the United States, Copeia 1967 1, 188-202 |
| Wilson R. L. (1968) Systematics and faunal analysis of a Lower Pliocene vertebrate assemblage from Trego County, Kansas, Contributions from the Museum of Paleontology, University of Michigan 22 7, 75-126 |
| Hirschfeld S. E., Webb S. D. (1968) Plio-Pleistocene Megalonychid Sloths of North America, Bulletin of the Florida State Museum 12 5 |
| Hibbard C. W., Jammot D. (1971) The Shrews of the WaKeeney Local Fauna, Lower Pliocene of Trego County, Kansas, Contributions from the Museum of Paleontology, University of Michigan 23 24, 377-380 |
| Storer J. E. (1973) The Entoptychine Geomyid聽Lignimus聽(Mammalia: Rodentia) from Kansas and Nebraska, Canadian Journal of Earth Sciences 10, 72-83 |
| Webb S. D. (1974) Pleistocene llamas of Florida, with a brief review of the Lamini, Pleistocene Mammals of Florida, 170-213 |
| Holman J. A. (1975) Herpetofauna of the WaKeeney local fauna (lower Pliocene: Clarendonian) of Trego County, Kansas, University of Michigan Papers on Paleontology 12, 49-66 |
| Green M., Holman J. A. (1977) A late Tertiary stream channel fauna from South Bijou Hill, South Dakota, Journal of Paleontology 51 3, 543-547 |
| Rich T. H. V. (1981) Origin and History of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America, Bulletin of the American Museum of Natural History 171 1, 1-116 |
| Harrison J. A. (1981) A review of the extinct wolverine, Plesiogulo (Carnivora: Mustelidae), from North America, Smithsonian Contributions to Paleobiology 46, 1-27 |
| Baskin J. A. (1982) Tertiary Procyoninae (Mammalia: Carnivora) of North America, Journal of Vertebrate Paleontology 2 1, 71-93 |
| Harrison J. A. (1983) The Carnivora of the Edson local fauna (late Hemphillian), Kansas, Smithsonian Contributions to Paleobiology 54, 1-42 |
| MacFadden B. J. (1984) Astrohippus and Dinohippus from the Yepomera Local Fauna (Hemphillian, Mexico) and Implications for the Phylogeny of One-Toed Horses, Journal of Vertebrate Paleontology 4 2, 273-283 |
| Martin L. D. (1984) , Carnegie Museum of Natural History Special Publication 8 |
| Holman J. A. (1984) Texasophis (Reptilia: Serpentes), an addition to the Miocene (Clarendonian) of North America, Copeia 1984 3, 660-661 |
| Hulbert, Jr. R. C. (1987) Late Neogene Neohipparion (Mammalia, Equidae) from the Gulf Coastal Plain of Florida and Texas, Journal of Paleontology 61 4, 809-830 |
| Munthe J. (1988) Miocene mammals of the Split Rock area, Granite Mountains basin, central Wyoming, University of California Publications in Geological Sciences 126, 1-136 |
| Hulbert, Jr. R. C. (1989) Phylogenetic Interrelationships and Evolution of North American Late Equidae, The Evolution of Perissodactyls |
| Prothero D. R. (1989) Personal communication regarding rhinocerotid identifications |
| Wright D. B. (1989) Phylogenetic relationships of Catagonus wagneri: sister taxa from the Tertiary of North America, Advances in Neotropical Mammalogy, 281-308 |
| Schultz G. E. (1990) Stop 16: Late Hemphillian faunas of the Texas and Oklahoma panhandles, Tertiary and Quaternary stratigraphy and vertebrate paleontology of parts of northwestern Texas and eastern New Mexico; Guidebook - Bureau of Economic Geology, University of Texas at Austin, 104-111 |
| Lambert W. D. (1990) Rediagnosis of the Genus Amebelodon (Mammalia, Proboscidea, Gomphotheriidae), with a New Subgenus and Species, Amebelodon (Konobelodon) britti, Journal of Paleontology 64 6, 1032-1040 |
| Evander R. L. (1993) Astrohippus walked on faerie toes, Journal of Vertebrate Paleontology 13 3, 34A |
| Kirkland, Jr. H. (1993) A complete Tertiary camel skull from Roger Mills County: description and CT scan, Proceedings of the Oklahoma Academy of Science 73, 63-65 |
| Baskin J. A. (1998) Evolutionary trends in the late Miocene hyena-like dog Epicyon (Carnivora, Canidae), National Science Museum Monographs 14, 191-214 |
| Hunt R. H. (1998) Ursidae, Evolution of Tertiary Mammals in North America, 174-189 |
| Wang X., Tedford R. H., et al (1999) Phylogenetic systematics of the Borophaginae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 243, 1-392 |
| Gordon C. L., Czaplewski N. J. (2000) A fossil marmot from the late Miocene of western Oklahoma, Oklahoma Geology Notes 60 2, 28-32 |
| Czaplewski N. J., Thurmond P. J., et al (2001) Wild Horse Creek #1; a late Miocene (Clarendonian-Hemphillian) vertebrate fossil assemblage in Roger Mills County, Oklahoma, Oklahoma Geology Notes 61 3, 60-67 |
| Lim J.-D., Martin L. D. (2001) New evidence for plant-eating in a Miocene mustelid, Current Science 81 3, 314-317 |
| Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals |
| Prothero D. R. (2005) The Evolution of North American Rhinoceroses, 1-218 |
| Alroy J. (2006) Synonymies and reidentifications of North American fossil vertebrates |
| Darnell M. K., Thomasson J. R. (2007) First equid remains from the late Miocene Prolithospermum johnstonii-Nassella pohlii assemblage zone stratotype locality, Ellis County, Kansas, Transactions of the Kansas Academy of Science 110 1-2, 10-15 |
| Alroy J. (2007) Synonymies and reidentifications of North American fossil vertebrates and so forth |
| Czaplewski N. J. (2008) Miocene Vertebrates From Ogallala Formation Sites in Western Oklahoma, Neogene Mammals (New Mexico Museum of Natural History and Science Bulletin) 44, 1-14 |
| Bever G. S., Zakrzewski R. J. (2009) A New Species of the Miocene Leptarctine Leptarctus (Carnivora: Mustelidae) From the Early Hemphillian of Kansas, Papers on Geology, Vertebrate Paleontology, and Biostratigraphy in Honor of Michael O. Woodburne (Museum of Northern Arizona Bulletin 65), 465--481 |
| Korth W. W., Baskin J. A. (2009) A new species of Leptarctus (Carnivora, Mustelidae) from the late Clarendonian (late Miocene) of Kansas, Annals of Carnegie Museum 78 1, 29-44 |
| Tedford R. H., Wang X., et al (2009) Phylogenetic Systematics of the North American Fossil Caninae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 325, 1-218 doi:10.1206/574.1 |
| Mihlbachler M. C., Rivals F., et al (2011) Dietary Change and Evolution of Horses in North America, Science 331, 1178-1181 doi:10.1126/science.1196166 |
| Bourque J. R. (2011) Reassessment of a putative fossil stinkpot (Kinosternidae: Sternotherus) from the late Miocene (Clarendonian) of Kansas, Journal of Herpetology 45 2, 234-237 doi:dx.doi.org/10.1670/10-095.1 |
| Ant贸n M., Salesa M. J., et al (2013) Machairodont adaptations and affinities of the Holarctic Late Miocene homotherin Machairodus (Mammalia, Carnivora, Felidae): the case of Machairodus catocopis Cope, 1887, Journal of Vertebrate Paleontology 33 5, 1202-1213 |
| Bourque J. R. (2015) New mud turtles (Kinosternidae,Kinosternon) from the middle鈥搇ate Miocene of the United States, Journal of Paleontology 89 5, 821-844 doi:10.1017/jpa.2015.63 |
