PBDB Collection

Peterson's Quarry (Cretaceous of the United States)

Also known as Peterson Quarry

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

Show authors, comments, and common names

Reptilia
Theropoda - Ornithomimidae	Ornithomimus minutus⁴ Ornithomimus minutus⁴ Marsh 1892 ornithomimid USNM 2909
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 segnis⁵, "Chamops denticulatus n. sp." = Leptochamops denticulatus⁵ Chamops segnis⁵ Marsh 1892 squamates USNM 8264 (partial right maxilla) "Chamops denticulatus n. sp." = Leptochamops denticulatus⁵ Gilmore 1928 squamates YUM 1062 (holotype left dentary)
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
Mammalia
Multituberculata - Cimolomyidae	Cimolomys sp., "Cimolomys digona" = Cimolomys gracilis, Meniscoessus robustus Cimolomys sp. Marsh 1889 multituberculate "Cimolomys digona" = Cimolomys gracilis Marsh 1889 multituberculate Meniscoessus robustus Marsh 1889 multituberculate
Multituberculata - Ptilodontidae	Allacodon lentus Allacodon lentus Marsh 1889 multituberculate
Multituberculata - Neoplagiaulacidae	Mesodma sp.¹ Mesodma sp.¹ Jepsen 1940 multituberculate
Multituberculata - Cimolodontidae	Cimolodon nitidus² Cimolodon nitidus² Marsh 1889 multituberculate
Theriamorpha - Gypsonictopidae	Gypsonictops hypoconus n. sp.³ Gypsonictops hypoconus n. sp.³ Simpson 1927 eutherian
Cimolesta - Cimolestidae	Cimolestes sp. Cimolestes sp. Marsh 1889 eutherian
Theriamorpha - Stagodontidae	"Didelphodon sp." = Didelphodon, "Stagodon sp." = Didelphodon, "Stagodon nitor" = Didelphodon vorax "Didelphodon sp." = Didelphodon Marsh 1889 metatherian "Stagodon sp." = Didelphodon Marsh 1889 metatherian "Stagodon nitor" = Didelphodon vorax Marsh 1889 metatherian
Theriamorpha - Pediomyidae	Pediomys sp., Pediomys elegans Pediomys sp. Marsh 1889 metatherian Pediomys elegans Marsh 1889 metatherian
Actinopteri
Acanthomorphata - Sciaenidae	Platacodon nanus n. gen. n. sp. Platacodon nanus n. gen. n. sp. Marsh 1889

¹Alroy 2002; ²Clemens 1964; ³Clemens 1973; ⁴Gilmore 1920; ⁵Gilmore 1928; ⁶Gilmore 1938