Lance Creek (YPM 1891 general) (Cretaceous of the United States)

Also known as Hatcher Sk. 31

Where: Niobrara County, Wyoming (43.2° N, 104.5° W: paleocoordinates 49.6° N, 79.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher in 1891; reposited in the USNM, YPM

Collection methods: quarrying, mechanical,

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 52695: authorized by Matthew Carrano, entered by Matthew Carrano on 16.08.2005, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Teiidae
Lanceosaurus hatcheri n. gen. n. sp.1
Lanceosaurus hatcheri n. gen. n. sp.1 Gilmore 1928 squamates
USNM 10706 (holotype), greater portion of left dentary with teeth; 10807, incomplete right maxilla; 10808, portion of right dentary with bases of teeth
 Ornithischia - Ceratopsidae
Triceratops horridus3 Marsh 1889 ceratopsid
YPM 1838 (= Sk. 31)
 Ornithischia - Hadrosauridae
"Anatosaurus sp." = Edmontosaurus2
"Anatosaurus sp." = Edmontosaurus2 Lambe 1917 hadrosaurine
YPM 618