Come-By-Chance, RTMP L1139 (Cretaceous of Canada)

Also known as CBC

Where: Alberta, Canada (49.2° N, 110.7° W: paleocoordinates 56.4° N, 76.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Upper Member (Oldman Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• 5.5 m lower than RDS site; "suggested" to be at base of upper unit; Nesmo's unit

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; argillaceous, sandy siltstone

• "60 cm thick, sandy, clayey siltstone. The host lithosome shows very poor internal organization and becomes coarser upward, which may suggest multiple flood events...poorly sorted caliche clasts."

Size class: mesofossils

Reposited in the TMP

Collection methods: bulk, sieve,

Primary reference: J. Peng, A. P. Russell, and D. B. Brinkman. 2001. Vertebrate microsite assemblages (exclusive of mammals) from the Foremost and Oldman Formations of the Judith River Group (Campanian) of southeastern Alberta: an illustrated guide. Provincial Museum of Alberta, Natural History Occasional Paper 25:1-54 [M. Carrano/M. Carrano/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 45897: authorized by Matthew Carrano, entered by Matthew Carrano on 13.12.2004, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
Bivalvia
 Cardiida - Sphaeriidae
"Pisidiidae indet." = Pisidiinae
"Pisidiidae indet." = Pisidiinae Gray 1857 clam
 Unionida - Unionidae
Unionidae indet. Rafinesque 1820 freshwater mussel
Chondrichthyes
 Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876 guitarfish
Amphibia
 Salientia -
 Proteida - Batrachosauroididae
Opisthotriton kayi Auffenberg 1961 salamander
 Caudata - Urodela
Scapherpeton tectum Cope 1876 salamander
Mammalia
 Allotheria -
Multituberculata indet.2 Cope 1884 multituberculate
 Multituberculata -
Cimexomys sp.2 Sloan and Van Valen 1965 multituberculate
 Multituberculata - Cimolomyidae
Cimolomyidae indet.2 Sloan and Van Valen 1965 multituberculate
Cimolomys clarki2 Sahni 1972 multituberculate
 Multituberculata - Neoplagiaulacidae
"Mesodma cf. primaeva" = Filikomys primaevus2, Mesodma cf. antiqua2
"Mesodma cf. primaeva" = Filikomys primaevus2 Lambe 1902 multituberculate
Possible incorrectly spelled "primaevus" [check 11931]
Mesodma cf. antiqua2 multituberculate
 Theriamorpha - Marsupialia
 Theriamorpha - Peradectidae
Reptilia
 Testudinata - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Chelydridae
Chelydridae indet. Swainson 1839 turtle
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Squamata -
cf. Palaeosaniwa canadensis Gilmore 1928 squamates
 Squamata - Helodermatidae
Helodermatidae indet. Gray 1837 squamates
 Squamata - Anguidae
Odaxosaurus cf. priscus Gao and Fox 1996 squamates
 Squamata - Chamopsiidae
Leptochamops sp. Estes 1964 squamates
 Loricata -
Crocodylia indet.1 crocodilian
 Crocodylia - Alligatoridae
 Ornithischia - Ankylosauridae
Ankylosauridae indet. Brown 1908 ankylosaurid
 Ornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Ornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Theropoda - Troodontidae
Troodon formosus Leidy 1856 maniraptoran
 Theropoda - Dromaeosauridae
Richardoestesia gilmorei Currie et al. 1990 maniraptoran
Saurornitholestes langstoni Sues 1978 maniraptoran
 Theropoda - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
 Choristodera -
Champsosaurus sp. Cope 1876 choristodere
Actinopteri
 Holostei -
 Lepisosteiformes - Lepisosteidae
"Atractosteus occidentalis" = Lepisosteus occidentalis
"Atractosteus occidentalis" = Lepisosteus occidentalis Leidy 1856 gar
 Amiiformes - Amiidae
Amiidae indet. Huxley 1861 bowfin
 Teleostei -
 Esociformes - Esocidae
Estesesox foxi Wilson et al. 1992
 Elopiformes - Phyllodontidae
Phyllodontinae indet. Darteville and Casier 1949
 Albuliformes - Albulidae
Coriops amnicolus Estes 1969 bonefish