Peterson's Quarry (Cretaceous of the United States)

Where: Niobrara County, Wyoming (43.1° N, 104.6° W: paleocoordinates 49.6° N, 79.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Lance Formation, Lancian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by O. A. Peterson, Marsh; reposited in the USNM, YPM

Collection methods: bulk, quarrying,

Primary reference: R. S. Lull. 1915. The mammals and horned dinosaurs of the Lance Formation of Niobrara County, Wyoming. The American Journal of Science, series 4 40(238):319-348 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14606: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano, Roger Benson and Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Acanthomorphata - Sciaenidae
Platacodon nanus n. gen. n. sp.
Platacodon nanus n. gen. n. sp. Marsh 1889
Reptilia
 Avetheropoda - Ornithomimidae
Ornithomimus minutus4 Marsh 1892 ornithomimid
USNM 2909
 Squamata - Xenosauridae
"Exostinus lancensis" = Exostinus lancensis5, "Harpagosaurus parvus n. gen. n. sp." = Exostinus lancensis5
"Exostinus lancensis" = Exostinus lancensis5 Gilmore 1928 squamates
USNM 10725 (parietal)
"Harpagosaurus parvus n. gen. n. sp." = Exostinus lancensis5 Gilmore 1928 squamates
USNM 10803 (holotype), right maxilla with 14 teeth
 Squamata -
"Megasaurus robustus n. gen. n. sp." = Palaeosaniwa canadensis5
"Megasaurus robustus n. gen. n. sp." = Palaeosaniwa canadensis5 Gilmore 1928 squamates
USNM 2910 (holotype), anterior caudal vertebrae
 Squamata - Anguidae
"Peltosaurus piger n. sp." = Odaxosaurus piger5
"Peltosaurus piger n. sp." = Odaxosaurus piger5 Gilmore 1928 squamates
USNM 10687, posterior portion of right dentary with 6 posterior teeth; USNM 10688, partial right maxilla with 7 teeth
 Squamata -
Coniophis precedens n. gen. n. sp.6
Coniophis precedens n. gen. n. sp.6 Marsh 1892 snake
USNM 2143 (holotype), single thoracic vertebra
 Squamata - Chamopsiidae
"Chamops denticulatus n. sp." = Leptochamops denticulatus5, Chamops segnis5
"Chamops denticulatus n. sp." = Leptochamops denticulatus5 Gilmore 1928 lizard
YUM 1062 (holotype left dentary)
Chamops segnis5 Marsh 1892 lizard
USNM 8264 (partial right maxilla)
Mammalia
 Cimolesta - Cimolestidae
Cimolestes sp. Marsh 1889 eutherian
 Leptictida - Gypsonictopidae
Gypsonictops hypoconus n. sp.3 Simpson 1927 eutherian
 Theriiformes - Peradectidae
Pediomys sp. Marsh 1889 metatherian
Pediomys elegans Marsh 1889 metatherian
 Didelphimorphia - Stagodontidae
"Didelphodon sp." = Didelphodon, "Stagodon nitor" = Didelphodon vorax, "Stagodon sp." = Didelphodon
"Didelphodon sp." = Didelphodon Marsh 1889 marsupial
"Stagodon nitor" = Didelphodon vorax Marsh 1889 marsupial
"Stagodon sp." = Didelphodon Marsh 1889 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate
Cimolomys sp. Marsh 1889 multituberculate
"Cimolomys digona" = Cimolomys gracilis Marsh 1889 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma sp.1 Jepsen 1940 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon nitidus2 Marsh 1889 multituberculate
 Multituberculata - Plagiaulacidae
Allacodon lentus Marsh 1889 multituberculate