Where: Sheridan County, Nebraska (42.7° N, 102.5° W: paleocoordinates 43.2° N, 99.7° W)
• coordinate based on political unit
• basin-level geographic resolution
When: Loup Fork Formation, Barstovian to Barstovian (16.3 - 9.4 Ma)
• Wang et al. (1999) considers the Niobrara River localities to be Barstovian - Clarendonian in age
•entered as "Loop Fork"
• formation-level stratigraphic resolution
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 | |
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis Leidy 1858 turtle | |
| Mammalia | |
"Elephas (Euelephas) imperator n. sp." = Mammuthus columbi
"Elephas (Euelephas) imperator n. sp." = Mammuthus columbi Falconer 1857 imperial mammoth | |
"Mastodon (Tetralophodon) mirificus n. sp." = Stegomastodon mirificus
"Mastodon (Tetralophodon) mirificus n. sp." = Stegomastodon mirificus Leidy 1858 gomphothere | |
"Castor (Eucastor) tortus n. sp." = Eucastor tortus, "Hystrix (Hystricops) venustus n. sp." = Hystricops venustus
"Castor (Eucastor) tortus n. sp." = Eucastor tortus Leidy 1858 beaver
"Hystrix (Hystricops) venustus n. sp." = Hystricops venustus Leidy 1858 beaver | |
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus Leidy 1858 cat | |
"Canis temerarius n. sp." = Paratomarctus temerarius, "Canis (Epicyon) haydeni n. sp." = Epicyon haydeni, "Canis saevus n. sp." = Epicyon saevus, Aelurodon ferox n. gen. n. sp., "Canis vafer n. sp." = Leptocyon vafer
"Canis temerarius n. sp." = Paratomarctus temerarius Leidy 1858 bone-crushing dog
"Canis (Epicyon) haydeni n. sp." = Epicyon haydeni Leidy 1858 bone-crushing dog
"Canis saevus n. sp." = Epicyon saevus Leidy 1858 bone-crushing dog
Aelurodon ferox n. gen. n. sp. Leidy 1858 bone-crushing dog
"Canis vafer n. sp." = Leptocyon vafer Leidy 1858 canine | |
Rhinoceros crassus n. sp.
Rhinoceros crassus n. sp. Leidy 1858 rhinoceros | |
"Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus, "Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis, "Merychippus mirabilis" = Pliohippus mirabilis, "Equus (Protohippus) perditus n. sp." = Protohippus perditus, Equus excelsus n. sp., "Hippotherium speciosum" = Neohipparion affine, "Hippotherium occidentale" = Cormohipparion occidentale, Merychippus insignis
"Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus Leidy 1858 anchitheriine horse
"Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis Leidy 1858 anchitheriine 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
"Hippotherium speciosum" = Neohipparion affine Leidy 1869 hipparionine horse
"Hippotherium occidentale" = Cormohipparion occidentale Leidy 1856 hipparionine horse
Merychippus insignis Leidy 1856 horse | |
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 | |
"Cervus warreni n. sp." = Merycodus warreni, Merycodus necatus n. sp.
"Cervus warreni n. sp." = Merycodus warreni Leidy 1858 pronghorn
Merycodus necatus n. sp. Leidy 1854 pronghorn | |
Merycochoerus proprius n. gen. n. sp., Merychyus elegans n. gen. n. sp., "Merychyus major n. sp." = Ustatochoerus major, "Merychyus medius n. sp." = Ustatochoerus medius
Merycochoerus proprius n. gen. n. sp. Leidy 1858 oreodont
Merychyus elegans n. gen. n. sp. Leidy 1858 oreodont
"Merychyus major n. sp." = Ustatochoerus major Leidy 1858 oreodont
"Merychyus medius n. sp." = Ustatochoerus medius Leidy 1858 oreodont | |