Brachychampsa locality (UCMP loc. V.86049) (Cretaceous of the United States)

Also known as UCMP V-86049

Where: Slope County County, North Dakota (46.4° N, 104.0° W: paleocoordinates 52.6° N, 77.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Hell Creek Formation, Lancian (70.6 - 66.0 Ma)

• Upper part of the Hell Creek Formation 23.3 m below its contact with the Ludlow Formation.

Environment/lithology: fluvial; sandstone and mudstone

• Specimen found in lag pocket in the basal part of a sandstone and mudstone filled channel complex

Size class: macrofossils

Reposited in the UCMP

Collection methods: surface (float), surface (in situ),

Primary reference: M. A. Norell, J. M. Clark, and J. H. Hutchison. 1994. The Late Cretaceous alligatoroid Brachychampsa montana (Crocodylia): new material and putative relationships. American Museum Novitates 3116:1-26 [R. Benson/R. Benson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137601: authorized by Roger Benson, entered by Roger Benson on 18.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825 gar
UCMP 177971–177972
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
UCMP 177974–177975, 178002
 Testudines - Compsemydidae
Compsemys victa Leidy 1856 turtle
UCMP 177973, 177976
 Testudines - Baenidae
Baenidae sp. turtle
UCMP 177977–177984
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
UCMP 177985– 177994
 Saurischia -
Saurischia indet. Seeley 1888 saurischian
UCMP 178000
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
UCMP 172451
 Crocodylia - Alligatoridae
Brachychampsa montana Gilmore 1911 crocodilian
UCMP 177996–177997; and 133901, which comprises a skull with articulated mandible; the hyoid skeleton; the vertebral column from atlas to sacrum but posterior part of the series poorly preserved; dorsal osteoderms of neck, trunk and proximal part oftail; ventral armor ofthroat (there appears to have been no belly armor); most of forelegs lacking only the distal ulnae and parts of the right manus; proximal parts of scapula and coracoid; interclavicle; right femur; left femur lacking distal end; proximal fibula; partial right ilium
 Choristodera -
Champsosaurus sp. Cope 1876 choristodere
UCMP 177998–177999