Robison Eggshell Site (CM) (Cretaceous to of the United States)

Also known as Egg Shell Quarry

Where: Emery County, Utah (39.1° N, 111.0° W: paleocoordinates 39.6° N, 72.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Mussentuchit Member (Cedar Mountain Formation), Late/Upper Albian to Late/Upper Albian (105.3 - 93.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; siltstone and mudstone

• broad alluvial floodplain
• "a variable stilstone-mudstone interval"

Size class: mesofossils

Collected in 1990-1991; reposited in the CM

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

Primary reference: M. E. Nelson and J. H. Madsen. 1985. Early Cretaceous mammals from central Utah. Geological Society of America, Rocky Mountain Section, Abstracts with Programs 17(4):258 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 22679: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 23.04.2001, edited by Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Chondrichthyes indet.1 Huxley 1880 cartilaginous fish
Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus sp.1 Agassiz 1837 elasmobranch
 Myliobatiformes - Myliobatidae
Pseudohypolophus sp.1 Cappetta and Case 1975 eagle ray
 Orectolobiformes -
Cretorectolobus sp.1 Case 1978 carpet shark
Gnathostomata
  -
Actinopteri
 Salmoniformes - Enchodontidae
Enchodus sp.1 Agassiz 1843
 Pycnodontiformes - Pycnodontidae
Pycnodontidae indet.1 Agassiz 1835
 Holostei -
Amiiformes indet.1 Hay 1929 bowfin
 Lepisosteiformes -
Lepidotes sp.1 Agassiz 1843 gar
Osteichthyes
 Salientia -
Reptilia
 Testudines -
"Chelonia indet." = Testudines1
"Chelonia indet." = Testudines1 Batsch 1788 turtle
 Testudines - Trionychidae
Trionychidae indet.1 Gray 1825 softshell turtle
 Testudinata - Helochelydridae
Naomichelys sp.1 Hay 1908 turtle
 Theropoda -
aff. Theropoda "indet. A"1 theropod
see Fiorillo & Currie 1994
Theropoda indet.1 theropod
 Avetheropoda - Dromaeosauridae
Velociraptorinae indet.1 Barsbold 1983 coelurosaur
Dromaeosaurinae indet.1 Matthew and Brown 1922 coelurosaur
 Avetheropoda -
"Paronychodon" sp.1 Cope 1876 coelurosaur
 Avetheropoda - Tyrannosauridae
cf. Tyrannosauridae indet.1 Osborn 1906 tyrannosaurid
 Saurischia - Elongatoolithidae
Elongatoolithidae indet.1 Zhao 1975 theropod
 Neornithischia -
Ornithopoda indet.1 bird foot dinosaur
 Neornithischia - Spheroolithidae
Spheroolithidae indet.1 Zhao 1979 bird foot dinosaur
 Loricata -
Mesoeucrocodylia indet.2 Whetstone and Whybrow 1983 crocodilian
Crocodylia indet. crocodilian
? Bernissartia sp.1 Dollo 1883 crocodilian
 Loricata - Pholidosauridae
 Squamata -
Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal