SDSM V931, Mile 175 (Jurassic to of the United States)

Where: Crook County, Wyoming (44.5° N, 104.7° W: paleocoordinates 39.8° N, 50.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Morrison Formation, Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• close to top of formation

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; lithology not reported

• poorly drained floodplain

Size classes: macrofossils, mesofossils

Reposited in the SDSM

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

Primary reference: J. R. Foster and K. C. Trujillo. 2000. New occurrences of Cteniogenys (Reptilia, Choristodera) in the Late Jurassic of Wyoming and South Dakota. Brigham Young University Geology Studies 45:11-18 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 56165: authorized by Matthew Carrano, entered by Matthew Carrano on 14.11.2005, edited by Philip Mannion and Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Vertebrata indet.2
Vertebrata indet.2 Lamarck 1801
Includes seven small vertebrae, one small caudal vertebra, five possible eggshell fragments, all probably from indeterminate reptiles, and about 25 angular to rounded fragments of larger bones, possibly belonging to dinosaurs. Finally, there are more than 100 fragmentary vertebrate specimens that could not be identified further; these include small vertebrae, teeth, phalanges, and limb bone fragments
Gnathostomata
  -
Osteichthyes indet.2
Osteichthyes indet.2 bony fish
MWC 5854 (tooth); "It is unknown for certain whether this is an actinopterygian tooth element, a dipnoan tooth, or something else"
Osteichthyes
 Ceratodontiformes -
Potamoceratodus sp.2
Potamoceratodus sp.2 Pardo et al. 2010 Australian lungfish
Reptilia
 Squamata -
Squamata indet.2
Squamata indet.2 squamates
Small procoelous vertebral centrum
 Dinosauria -
Dinosauria indet.2
Dinosauria indet.2 dinosaur
Indeterminate eggshell
 Theropoda -
Theropoda indet.
Theropoda indet. theropod
Eight isolated teeth and tooth fragments, including UW 18237
 Ornithischia - Hypsilophodontidae
Hypsilophodontidae indet.2
Hypsilophodontidae indet.2 hypsilophodontid
Teeth, including MWC 5851
 Ornithischia -
"Othnielosaurus sp." = Nanosaurus2
"Othnielosaurus sp." = Nanosaurus2 Marsh 1877 ornithopod
 Loricata -
Crocodyliformes indet.2
Crocodyliformes indet.2 Hay 1930 crocodilian
Teeth
 Loricata - Goniopholididae
Goniopholididae indet.2
Goniopholididae indet.2 Cope 1875 crocodilian
 Choristodera - Cteniogenyidae
Cteniogenys sp.2
Cteniogenys sp.2 Gilmore 1928 choristodere
 Testudinata -
Testudinata indet.2
Testudinata indet.2 Oppel 1811 turtle
 Testudinata - Pleurosternidae
Glyptops sp.2, Dinochelys sp.2
Glyptops sp.2 Marsh 1890 turtle
Shell fragments
Dinochelys sp.2 Gaffney 1979 turtle
Shell fragments
Osteichthyes
 Docodonta - Docodontidae
Docodon sp.2, Docodon victor3
Docodon sp.2 Marsh 1881 dodocont
UW 20578 (partial molar)
Docodon victor3 Marsh 1880 dodocont
UW 20578, partial right lower molar
Mammalia
  -
Mammalia indet.1
Mammalia indet.1 Linnaeus 1758 mammal
Teeth, including UW 20218, UW 20577, MWC 5816, MWC 5855 and JRF 2000-2
 Allotheria -
Multituberculata indet.2
Multituberculata indet.2 Cope 1884 multituberculate
UW 18027 (tooth); "probably Ctenacodon or Psalodon"
Amphibia
 Caudata -
Caudata indet.2
Caudata indet.2 salamander
Six small, unassociated vertebrae
Gnathostomata
  -
Actinopterygii " indet. B "2
Actinopterygii " indet. B "2 ray-finned fish
Scale morphotype 2
Actinopteri
 Amiiformes -
Amioidei indet.2
Amioidei indet.2 bowfin
Scales; includes MWC 5276
Osteichthyes
 Actinopterygii -
Actinopterygii " indet. A "2
Actinopterygii " indet. A "2 Cope 1887 ray-finned fish
1Foster 2003; 2Foster and Heckert 2011; 3Foster et al. 2006