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
| 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 | |
Merychippus insignis, "Equus (Protohippus) perditus n. sp." = Protohippus perditus, "Merychippus mirabilis" = Pliohippus mirabilis, Equus excelsus n. sp., "Hippotherium speciosum" = Neohipparion affine, "Hippotherium occidentale" = Cormohipparion occidentale, "Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis, "Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus
Merychippus insignis Leidy 1856 horse
"Equus (Protohippus) perditus n. sp." = Protohippus perditus Leidy 1858 horse
"Merychippus mirabilis" = Pliohippus mirabilis 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
"Anchitherium (Hypohippus) affinis n. sp." = Hypohippus affinis Leidy 1858 anchitheriine horse
"Anchitherium (Parahippus) cognatus n. sp." = Parahippus cognatus Leidy 1858 anchitheriine horse | |
Rhinoceros crassus n. sp.
Rhinoceros crassus n. sp. Leidy 1858 rhinoceros | |
"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 | |
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 | |
Merycochoerus proprius n. gen. n. sp., Merychyus elegans n. gen. n. sp., "Merychyus medius n. sp." = Ustatochoerus medius, "Merychyus major n. sp." = Ustatochoerus major
Merycochoerus proprius n. gen. n. sp. Leidy 1858 oreodont
Merychyus elegans n. gen. n. sp. Leidy 1858 oreodont
"Merychyus medius n. sp." = Ustatochoerus medius Leidy 1858 oreodont
"Merychyus major n. sp." = Ustatochoerus major Leidy 1858 oreodont | |
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus
"Felis (Pseudaelurus) intrepidus n. sp." = Pseudaelurus intrepidus Leidy 1858 cat | |
"Canis vafer n. sp." = Leptocyon vafer, "Canis (Epicyon) haydeni n. sp." = Epicyon haydeni, "Canis saevus n. sp." = Epicyon saevus, "Canis temerarius n. sp." = Paratomarctus temerarius, Aelurodon ferox n. gen. n. sp.
"Canis vafer n. sp." = Leptocyon vafer Leidy 1858 canine
"Canis (Epicyon) haydeni n. sp." = Epicyon haydeni Leidy 1858 bone-crushing dog
"Canis saevus n. sp." = Epicyon saevus Leidy 1858 bone-crushing dog
"Canis temerarius n. sp." = Paratomarctus temerarius Leidy 1858 bone-crushing dog
Aelurodon ferox n. gen. n. sp. Leidy 1858 bone-crushing dog | |
"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 | |
| Reptilia | |
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis
"Testudo (Stylemys) niobrarensis n. sp." = Testudo niobrarensis Leidy 1858 turtle | |