Little Houston Quarry, Main Quarry (SDSM V9138) (Jurassic to of the United States)

Also known as WY-11

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

Collected by J. Foster; reposited in the SDSM

Collection methods: quarrying, mechanical,

Primary reference: J. R. Foster. 1993. Sedminentology and taphonomy of the Little Houston Quarry, Morrison Formation (Upper Jurassic), northeast Wyoming. Journal of Vertebrate Paleontology 13(3, suppl.):38A [A. Behrensmeyer/A. Behrensmeyer/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49636: authorized by Matthew Carrano, entered by Matthew Carrano on 21.04.2005, edited by Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Actinopterygii indet. ray-finned fish
Osteichthyes
 Dipnoi -
Dipnoi indet.3 Müller 1884 lungfish
 Salientia -
Reptilia
 Testudines -
Testudines indet. Batsch 1788 turtle
 Saurischia - Diplodocidae
Diplodocus sp.1 Marsh 1878 diplodocine
either Diplodocus or Barosaurus; SDSM 25258
Apatosaurus sp.2 Marsh 1877 diplodocid
 Saurischia - Camarasauridae
Camarasaurus sp. Cope 1877 camarasaurid
 Avetheropoda - Allosauridae
Allosaurus sp. Marsh 1877 allosaurid
SDSM 30510
 Ornithischia -
Ornithischia indet.5 ornithischian
 Ornithischia - Stegosauridae
Stegosaurus sp.5 Marsh 1877 ornithischian
 Neornithischia - Dryosauridae
Dryosaurus sp.5 Marsh 1894 bird foot dinosaur
 Neornithischia -
Othnielia sp.2 Galton 1977 bird foot dinosaur
 Loricata -
Crocodylia indet. crocodilian
 Squamata -
 Choristodera -
Cteniogenys antiquus3 Gilmore 1928 choristodere
Mammalia
 Docodonta - Docodontidae
Docodon victor4 Marsh 1880 dodocont
 Multituberculata - Allodontidae
Psalodon marshi3 Simpson 1929 multituberculate