...John E. Storer Abstract Neohipparion sp. from the Flaxville Gravel of Sheridan County, northern Montana, compares well with late Hemphillian species of Neohipparion in height of crown, shape of protocone, and development of pli caballin. A late Hemphillian age conflicts with the Barstovian...

...FIG. 1. — Neohipparion gidleyi Merriam, natural size, Petaluma formation, late Hemphillian. a. M 3 ¯ , holotype, well worn, occlusal-lingual and labial views, No. 21382. b. M 3 ¯ , paratype, heavily worn, occlusal and lingual views, No. 2251. c - d . Lower premolars...

... of Amphicyon, Pliohippus, Neohipparion, Procamelus, Blickotherium, and an indeterminate cervid, appears to be lower Pliocene in age. Horses are the most important element, and it is mainly on the basis of these forms that the age determination has been made. A small flora, associated with the mammalian fauna...

..., on the early identifications of fossil vertebrates from the Coalinga area in California, and in part on the percentage methods as applied to the invertebrates. The horse teeth, Neohipparion molle Merriam, from the Jacalitos, which were used to mark the beginning of Pliocene time on the Pacific Coast, we now...

... at site 50 from units 7 and 8 were a large tortoise ( Geochelone sp.), a browsing probocidean (cf. Gomphoterium sp.), grazing and browsing rhinoceroses ( Teleoceras sp. and Aphelops sp.), at least one grazing horse ( Neohipparion sp.), a canid carnivore ( Epicyon sp.), and numerous as yet...

...; Dinohippus mexicanus Lance, 1950 ; Neohipparion eurystyle Matthew, 1909; Teleoceras fossiger (Cope, 1878 ); Rhynchotherium cf. R . falconeri Osborn, 1923 ; and Hemiauchenia vera Matthew, 1909. Table 1 Measurements of the mandibles of Zacatzontli tecolotlanensis n. gen. n. sp. (MPG 1312G...

... 0.0011 Neohipparion Hh4 27 0.30 0.13 Pliohippus Hh2 10 −0.12 0.74 Hipparion Cl3 43 0.036 0.82 Hypohippus Ba1 19 −0.21 0.37 Archaeohippus Ba1 13 0.20 0.50 Desmatippus Ba1 12 −0.020 0.95 Acritohippus Ba1 36 −0.46 0.0043 Merychippus Ba1...

... = “ Merychippus ” insignis ; mio = Miohippus ; mp = “ Merychippus ” primus ; na = Nannippus ; ne = Neohipparion ; on = Onohippidium ; or = Orohippus ; pc = “ Parahippus “ cognatus ; pl = “ P .” leonensis ; pr = Protohippus . ...

...; Baskin, 1995 ) was determined on wood from the next younger terrace unit at a gravel pit 20 km upstream from Odem (Cornish and Baskin, 1995 ). In addition, the terrace fill sequence has yielded early Pliocene (latest Hemphillian) horses, including Astrohippus , Nannippus , and Neohipparion , clearly...

... cerasinus ; E, Calippus elachistus ; F, Cormohipparion ingenuum ; G, Cormohipparion plicatile ; H, Nannippus westoni ; I, Neohipparion trampasense ; J, Protohippus gidleyi ; K, Pseudhipparion skinneri ; L, Gomphotherium sp.; M, Aphelops malacorhinus ; N, Teleoceras proterum ; O, Tapirus simpsoni . ...

... clusters are definable by discontinuities in the data ( Fig. 2 ). The dp4 data (not shown) yielded a similar pattern with five distinct clusters. Hulbert (1982) located clusters that were interpreted as cohorts in the equid ( Neohipparion ) assemblage from the LBB and discussed why they might exist...

... , R. C. , 1982 , Dynamics of the three-toed horse Neohipparion from the late Miocene of Florida : Paleobiology , 8 . 159 – 167 . Ibrahim , J. G. , Chen , M-H. , and Sinha , D. , 2001 , Bayesian survival analysis , Springer New York . Kohler , I. V. , Preston...

... , 169 p. Storer J.E. 1969 . An Upper Pliocene neohipparion from the Flaxville Gravels, northern Montana . Canadian Journal of Earth Sciences , 6 : 791 – 794 . Storer J.E. 1975 . Middle Miocene mammals from the Cypress Hills, Canada . Canadian Journal of Earth Sciences , 12...