Billy Creek 2 (Cretaceous of the United States)

Also known as UCMP V-75173

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• coordinate based on unpublished field data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: terrestrial; sandstone

Size class: mesofossils

Reposited in the UCMP

Collection methods: bulk, 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 14513: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• see note on Billy Creek 1
Chondrichthyes
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus2 Cope 1876 whiptail stingray
Actinopteri
 Amiiformes - Amiidae
Amia sp.2 Linnaeus 1766 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.2 de Lacep├Ęde 1803 gar
Osteichthyes
 Caudata - Urodela
Habrosaurus sp.2 Gilmore 1928 siren
Scapherpeton sp.2 Cope 1876 salamander
Scapherpeton tectum2 Cope 1876 salamander
Reptilia
 Testudines - Trionychidae
Trionychidae indet.2 Gray 1825 softshell turtle
 Testudines - Baenidae
Baenidae indet.2 Cope 1882 turtle
 Testudines -
Compsemys sp.2 Leidy 1856 turtle
Compsemys victa2 Leidy 1856 turtle
 Testudines - Nanhsiungchelyidae
Basilemys sp.2 Hay 1902 turtle
 Testudines - Adocidae
Adocus sp.2 Cope 1868 turtle
 Testudines - Pantrionychidae
"Plastomeninae indet." = Plastomenidae2, Helopanoplia sp.2
"Plastomeninae indet." = Plastomenidae2 Hay 1902 turtle
Helopanoplia sp.2 Hay 1908 turtle
 Testudines - Panchelydridae
 Theropoda -
 Avetheropoda - Dromaeosauridae
Saurornitholestinae indet.3 Longrich and Currie 2009 coelurosaur
UCMP 187039
 Avetheropoda -
Paronychodon sp.2 Cope 1876 coelurosaur
 Avetheropoda - Ornithomimidae
Ornithomimidae indet.2 Marsh 1890 ornithomimid
 Avetheropoda - Coeluridae
"Coelurosauridae indet." = Coeluridae2
"Coelurosauridae indet." = Coeluridae2 Marsh 1881 coelurid
 Neornithischia - Ceratopsidae
Ceratopsidae indet.2 Marsh 1888 ceratopsid
 Loricata -
Crocodylia indet.2 crocodilian
Crocodylia indet.1 crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet.2 Cuvier 1807 crocodile
 Crocodylia - Alligatoridae
Alligatoridae indet.2 Gray 1844 crocodilian
Brachychampsa sp.2 Gilmore 1911 crocodilian
 Squamata -
Squamata indet.2 Oppel 1811 lizard
Mammalia
  -
Mammalia indet.2 Linnaeus 1758 mammal
 Theriiformes -
Theria indet.2 Parker and Haswell 1897 mammal
 Didelphimorphia - Stagodontidae
Didelphodon vorax Marsh 1889 marsupial