Hatcher Springs, Johnson Brothers' ranch (Cretaceous of the United States)

Also known as Trachodon longiceps type

Where: Converse County, Wyoming (42.6° N, 105.4° W: paleocoordinates 49.2° N, 80.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• same stratum as Triceratops horridus type

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; poorly lithified, yellow sandstone and shale

• "soft, light-colored sandstone...heavily bedded, yellow."

Size classes: macrofossils, mesofossils

Collected by J. B. Hatcher in 1889; reposited in the YPM

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: J. B. Hatcher, O. C. Marsh, and R. S. Lull. 1907. The Ceratopsia. Monographs of the United States Geological Survey 49:1-198 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46120: authorized by Matthew Carrano, entered by Matthew Carrano on 03.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Reptilia
  -
Reptilia indet. Laurenti 1768 reptile
 Ornithischia - Hadrosauridae
"Trachodon longiceps n. sp." = Edmontosaurus annectens
"Trachodon longiceps n. sp." = Edmontosaurus annectens Marsh 1892 hadrosaurine
Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal
"Laramie mammals"
Amphibia
  -
Amphibia indet. Linnaeus 1758 tetrapod