south side of Lightning Creek (Cretaceous of the United States)

Also known as Lance Creek, Hatcher Sk. 21

Where: Niobrara County, Wyoming (43.2° N, 104.7° W: paleocoordinates 49.7° N, 79.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher in 1891; reposited in the 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 52683: authorized by Matthew Carrano, entered by Matthew Carrano on 16.08.2005, edited by Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Ceratopsidae
"Triceratops cf. brevicornis" = Triceratops horridus2
"Triceratops cf. brevicornis" = Triceratops horridus2 Marsh 1889 ceratopsid
YPM 1832, plesiotype (= Sk. 21)
 Testudinata - Baenidae
Baena marshi n. sp.1
Baena marshi n. sp.1 Hay 1904 turtle
YPM 299 (Hay, 1904, pp. 261-263, fig. 1, pl. 11; 1908, pp. 62, 63, fig. 39, pl. 8 fig. 2), Hay mentioned but did not figure carapace elements, but the type currently consists only of the plastron