Little Houston Quarry, Mammal Quarry (SDSM V941) (Jurassic to of the United States)

Also known as LHMQ

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

• coordinate estimated from map

• small collection-level geographic resolution

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

• two closely spaced beds

• group of beds-level stratigraphic resolution

Environment/lithology: pond; green mudstone and gray, green siltstone

• pond formed from abandoned stream channel
• "interbedded light green, laminated silstone and green mudstone." "The bone-bearing lithosome is a light greenish-gray, finely laminated siltstone with thinly interbedded claystones"

Size classes: macrofossils, mesofossils

Reposited in the SDSM

Collection methods: quarrying, mechanical,

Primary reference: J. R. Foster and J. E. Martin. 1995. Late Jurassic mammals from the Morrison Formation, Crook County, Wyoming. Journal of Vertebrate Paleontology 15(3, suppl.):29A [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 56167: authorized by Matthew Carrano, entered by Matthew Carrano on 14.11.2005, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Actinopterygii indet.1 ray-finned fish
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus sp.1 Agassiz 1838 lungfish
 Salientia -
Reptilia
  -
? Reptilia indet.1 Laurenti 1768 reptile
 Testudines -
"Chelonia indet." = Testudines1
"Chelonia indet." = Testudines1 Batsch 1788 turtle
 Testudines - Pleurosternidae
Dinochelys whitei1 Gaffney 1979 turtle
Glyptops plicatulus1 Cope 1877 turtle
 Saurischia - Camarasauridae
Camarasaurus sp.1 Cope 1877 camarasaurid
 Theropoda -
 Neornithischia -
Ornithopoda indet.1 bird foot dinosaur
 Neornithischia - Dryosauridae
Dryosaurus altus1 Marsh 1878 bird foot dinosaur
 Neornithischia -
"Othnielia rex" = Nanosaurus rex1
"Othnielia rex" = Nanosaurus rex1 Marsh 1877 bird foot dinosaur
incl. MWC 5822 (L dentary)
 Loricata -
Crocodylia indet.1 crocodilian
Theriosuchus morrisonensis n. sp.2 Foster 2018 crocodilian
MWC 5625, L lower jaw
 Squamata -
? Scincomorpha indet.1 Camp 1923 lizard
 Rhynchocephalia -
? Opisthias sp.1 Gilmore 1909 rhynchocephalian
 Choristodera -
Cteniogenys sp.1 Gilmore 1928 choristodere
Mammalia
  -
Mammalia indet.1 Linnaeus 1758 mammal
 Triconodonta -
Triconodonta indet.1 Osborn 1888 triconodont
 Theriiformes - Dryolestidae
Dryolestidae indet.1 Marsh 1879 mammal
 Docodonta - Docodontidae
Docodon victor3 Marsh 1880 dodocont
 Multituberculata - Allodontidae
Psalodon marshi1 Simpson 1929 multituberculate