Billy Creek 1 (Cretaceous of the United States)

Also known as UCMP V-72211

Where: Garfield County, Montana (47.6° N, 107.3° W: paleocoordinates 54.5° N, 80.4° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; sandstone

Size classes: macrofossils, mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), sieve,

Primary reference: J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14512: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• paleomagnetic sections are given by Archibald et al. 1982 and Swisher et al. 1995 but are not very helpful because the locality is from a channel sandstone deeply incised into the formation
 Acipenseriformes - Acipenseridae
Acipenseridae indet.1 Bonaparte 1831
Acipenser sp.1 Linnaeus 1758 sturgeon
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet.1 Cuvier 1825 gar
Lepisosteus occidentalis1 Leidy 1856 gar
 Tetrapoda -
Reptilia indet.1 Laurenti 1768 reptile
 Testudines -
Testudines indet.1 Batsch 1788 turtle
 Testudines - Macrobaenidae
Macrobaenidae indet.1, "Clemmys backmani" = Judithemys backmani1
"Clemmys backmani" = Judithemys backmani1 Russell 1934 turtle
 Testudines - Trionychidae
Trionychidae indet.1 Gray 1825 softshell turtle
Trionychinae indet.1 softshell turtle
 Testudines -
Compsemys sp.1 Leidy 1856 turtle
Compsemys victa1 Leidy 1856 turtle
 Testudines - Baenidae
Baenidae indet.1 Cope 1882 turtle
cf. Neurankylus sp.1 Lambe 1902 turtle
 Testudines -
Cryptodira indet.1 Cope 1868 turtle
 Testudines - Kinosternoidea
 Testudines - Pantrionychidae
"Plastomeninae indet." = Plastomenidae1
"Plastomeninae indet." = Plastomenidae1 Hay 1902 turtle
 Testudines -
"? Emarginochelys sp." = Emarginachelys1, Tullochelys montana2
"? Emarginochelys sp." = Emarginachelys1 Whetstone 1978 turtle
Tullochelys montana2 Hutchison 2013 turtle
 Theropoda -
 Neornithischia - Hypsilophodontidae
Hypsilophodontidae indet.1 Dollo 1882 hypsilophodontid
 Loricata -
Crocodylia indet.1 crocodilian
 Crocodylia - Crocodylidae
? Crocodylidae indet.1 Cuvier 1807 crocodile
 Crocodylia -
Alligatoroidea indet.1 Gray 1844 crocodilian
Brachychampsa montana1 Gilmore 1911 crocodilian
 Choristodera - Champsosauridae
Champsosauridae indet.1 Cope 1876 champsosaur
 Choristodera -
Champsosaurus cf. natator1 Parks 1933 choristodere
 Multituberculata - Neoplagiaulacidae
Mesodma thompsoni1 Clemens 1964 multituberculate