Niobrara River (coll. Hayden 1857) (Miocene of the United States)

Where: Sheridan County, Nebraska (42.7° N, 102.5° W: paleocoordinates 43.2° N, 99.5° W)

• coordinate based on political unit

When: Loop Fork Formation, Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by F. V. Hayden group in 1857; reposited in the USNM

Primary reference: J. Leidy. 1858. Notice of Remains of Extinct Vertebrata, from the Valley of the Niobrara River, Collected during the Exploring Expedition of 1857, in Nebraska, under the Command of Lieut. G. K. Warren, U. S. Top. Eng., by Dr. F. V. Hayden, Geologist to the Expedition. Proceedings of the Academy of Natural Sciences of Philadelphia 10:15-89 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190543: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 11.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Pantestudinidae
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis Leidy 1858 turtle
Mammalia
 Rodentia - Castoridae
"Hystrix (Hystricops) venustus n. sp." = Hystricops venustus, "Castor (Eucastor) tortus n. sp." = Eucastor tortus
"Hystrix (Hystricops) venustus n. sp." = Hystricops venustus Leidy 1858 beaver
"Castor (Eucastor) tortus n. sp." = Eucastor tortus Leidy 1858 beaver
 Perissodactyla - Rhinocerotidae
Rhinoceros crassus n. sp. Leidy 1858 rhinoceros
 Perissodactyla - Equidae
Merychippus insignis, "Hippotherium occidentale" = Cormohipparion occidentale, "Hippotherium speciosum" = Neohipparion affine, "Merychippus mirabilis" = Pliohippus mirabilis, "Equus (Protohippus) perditus n. sp." = Protohippus perditus, Equus excelsus n. sp., "Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus, "Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis
Merychippus insignis Leidy 1856 horse
"Hippotherium occidentale" = Cormohipparion occidentale Leidy 1856 hipparionine horse
"Hippotherium speciosum" = Neohipparion affine Leidy 1869 hipparionine horse
"Merychippus mirabilis" = Pliohippus mirabilis Leidy 1858 horse
"Equus (Protohippus) perditus n. sp." = Protohippus perditus Leidy 1858 horse
Equus excelsus n. sp. Leidy 1858 horse
"Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus Leidy 1858 anchitheriine horse
"Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis Leidy 1858 anchitheriine horse
 Carnivora - Canidae
"Canis vafer n. sp." = Leptocyon vafer, Aelurodon ferox n. gen. n. sp., "Canis saevus n. sp." = Epicyon saevus, "Canis (Epicyon) haydeni n. sp." = Epicyon haydeni, "Canis temerarius n. sp." = Paratomarctus temerarius
"Canis vafer n. sp." = Leptocyon vafer Leidy 1858 canine
Aelurodon ferox n. gen. n. sp. Leidy 1858 bone-crushing dog
"Canis saevus n. sp." = Epicyon saevus Leidy 1858 bone-crushing dog
"Canis (Epicyon) haydeni n. sp." = Epicyon haydeni Leidy 1858 bone-crushing dog
"Canis temerarius n. sp." = Paratomarctus temerarius Leidy 1858 bone-crushing dog
 Carnivora - Felidae
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus Leidy 1858 cat
 Proboscidea - Gomphotheriidae
"Mastodon (Tetralophodon) mirificus n. sp." = Stegomastodon mirificus
"Mastodon (Tetralophodon) mirificus n. sp." = Stegomastodon mirificus Leidy 1858 gomphothere
 Proboscidea - Elephantidae
"Elephas (Euelephas) imperator n. sp." = Mammuthus columbi
"Elephas (Euelephas) imperator n. sp." = Mammuthus columbi Falconer 1857 imperial mammoth
 Ungulata - Merycoidodontidae
"Merychyus major n. sp." = Ustatochoerus major, "Merychyus medius n. sp." = Ustatochoerus medius, Merychyus elegans n. gen. n. sp., Merycochoerus proprius n. gen. n. sp.
"Merychyus major n. sp." = Ustatochoerus major Leidy 1858 oreodont
"Merychyus medius n. sp." = Ustatochoerus medius Leidy 1858 oreodont
Merychyus elegans n. gen. n. sp. Leidy 1858 oreodont
Merycochoerus proprius n. gen. n. sp. Leidy 1858 oreodont
 Ungulata - Camelidae
Procamelus occidentalis n. gen. n. sp., Megalomeryx niobrarensis n. gen. n. sp.
Procamelus occidentalis n. gen. n. sp. Leidy 1858 camel
Megalomeryx niobrarensis n. gen. n. sp. Leidy 1858 camel
 Ungulata - Antilocapridae
Merycodus mecatus n. sp., "Cervus warreni n. sp." = Merycodus warreni
Merycodus mecatus n. sp. pronghorn
"Cervus warreni n. sp." = Merycodus warreni Leidy 1858 pronghorn