Blackbird Ridge Quarry (BBR) (Cretaceous to of the United States)

Where: Golden Valley County, Montana (46.4° N, 109.3° W: paleocoordinates 53.5° N, 76.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Judith River Formation (Montana Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• Judithian based on fauna

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone

Size class: mesofossils

Primary reference: R. W. Blob. 1992. B. A. thesis [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 14434: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Matthew Carrano and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Alphadon sp." omitted for unknown reasons by Fiorillo 1997
Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus sp.2 Agassiz 1834 elasmobranch
 Rajiformes - Rhinobatidae
Myledaphus sp.2 Cope 1876 guitarfish
 Orectolobiformes - Orectolobidae
Squatiscyllium sp.2 Cappetta 1980 wobbegong
Mammalia
 Multituberculata - Cimolomyidae
Meniscoessus sp. Cope 1882 multituberculate
Cimolomys sp. Marsh 1889 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma sp.2 Jepsen 1940 multituberculate
 Theriamorpha - Gypsonictopidae
Gypsonictops sp. Simpson 1927 eutherian
 Theriamorpha - Pediomyidae
Pediomyidae indet.1 Simpson 1927 metatherian
omitted for unknown reasons by Fiorillo 1997
Reptilia
 Testudinata - Baenidae
Boremys sp.2 Lambe 1906 turtle
 Testudines - Trionychidae
Aspideretes sp.2 Hay 1904 softshell turtle
 Squamata - Necrosauridae
Labrodioctes montanensis n. gen. n. sp.4
Labrodioctes montanensis n. gen. n. sp.4 Gao and Fox 1996 squamates
ANSP 18664 (holotype dentary)
 Theropoda -
Theropoda "indet. A"3 Marsh 1881 theropod
 Theropoda - Troodontidae
Troodon sp.2 Leidy 1856 maniraptoran
 Theropoda - Dromaeosauridae
Richardoestesia gilmorei3 Currie et al. 1990 maniraptoran
Saurornitholestes langstoni3 Sues 1978 maniraptoran
Dromaeosaurus albertensis3 Matthew and Brown 1922 maniraptoran