MOR CL-121, Bridger (Cretaceous of the United States)

Where: Montana (45.3° N, 108.4° W: paleocoordinates 44.6° N, 63.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Himes Member (Cloverly Formation), Albian (113.0 - 100.5 Ma)

• Ostrom's Unit VII

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray mudstone

• "a weathered, grey mudstone with abundant caliche"

Size classes: macrofossils, mesofossils

Collected in 1992

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

Primary reference: W. D. Maxwell. 1993. Neonate dinosaur remains and dinosaur eggshell from the Lower Cretaceous Cloverly Formation, Montana. Journal of Vertebrate Paleontology 13(3, suppl.):49A [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 55246: authorized by Matthew Carrano, entered by Matthew Carrano on 03.10.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
Gastropoda
  -
Gastropoda indet. Cuvier 1797 snail
Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus sp. Agassiz 1837 elasmobranch
 Myliobatiformes - Myliobatidae
Pseudohypolophus sp. Cappetta and Case 1975 eagle ray
Gnathostomata
  -
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus sp. Agassiz 1838 lungfish
Reptilia
 Testudinata - Helochelydridae
cf. Naomichelys sp. Hay 1908 turtle
 Dinosauria -
Dinosauria indet. dinosaur
3-5 types of eggshell
 Saurischia -
 Avetheropoda - Caenagnathidae
Microvenator sp. Ostrom 1970 coelurosaur
 Avetheropoda - Dromaeosauridae
Deinonychus sp. Ostrom 1969 coelurosaur
 Ornithischia - Nodosauridae
Sauropelta sp. Ostrom 1970 ornithischian
 Neornithischia - Hypsilophodontidae
Hypsilophodontidae indet. Dollo 1882 hypsilophodontid
 Loricata -
Crocodylia indet. crocodilian
Mammalia
 Eutriconodonta - Triconodontidae
Triconodontidae indet. Marsh 1887 mammal
unclassified
  -
Plantae indet. Haeckel 1866