Little Houston Quarry (SDSM V9138, SDSM V941): Kimmeridgian - Tithonian, Wyoming
collected by J. Foster

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
? Pteridospermatophyta indet.
Foster et al. 2020 1 specimen
JRF 9411
Charophyta indet. Migula 1890
Foster et al. 2020 3 specimens
now lost
Gymnospermae
? Gymnospermae indet. ()
Foster et al. 2020
replaced by Pinophyta
SDSM 25305
Polypodiopsida - Equisetales - Equisetaceae
Equisetum sp. Linnaeus 1753
Foster et al. 2020 1 specimen
JRF 95153
Actinopterygii
Actinopterygii indet. Cope 1887
32 specimens
JRF 9470, 9588, 95232, 9529, 9572, 95138; MWC 5762, 5779,
Dipnoi - Ceratodontidae
Dipnoi indet. Müller 1884
Foster and Trujillo 2000 2 specimens
    = Ceratodus sp. Agassiz 1838
Foster 2001
    = Ceratodus fossanovum
Foster et al. 2020
MWC 6505
Reptilia
? Reptilia indet. Laurenti 1768
Foster 2001 136 specimens
Reptilia - Cteniogenyidae
Cteniogenys antiquus Gilmore 1928
Foster and Trujillo 2000 6 specimens
Reptilia
? Opisthias sp. Gilmore 1909
Foster 2001 4 specimens
EBG 9833
Archosauromorpha indet. (Huene 1946)
Foster et al. 2020 1 specimen
JRF 95208
Theropoda indet. (Marsh 1881)
Foster 2001 35 specimens
Theropoda informal indet. B (Marsh 1881)
Foster et al. 2020 1 specimen
MWC
Theropoda informal indet. E (Marsh 1881)
Foster et al. 2020 1 specimen
EBG 9830
? Abelisauroidea indet. Bonaparte 1991
Foster et al. 2020 2 specimens
JRF 94130 ("Tooth Type D")
Reptilia - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969
Foster et al. 2020 1 specimen
JRF 95188
cf. Richardoestesia sp. Currie et al. 1990
Foster et al. 2020 1 specimen
JRF 95222 ("Tooth Type A (cf. Richardoestesia?)")
Reptilia
? Tanycolagreus sp. Carpenter et al. 2005
Foster et al. 2020 1 specimen
JRF 95215, R MT II
? Allosaurus sp. Marsh 1877
Foster et al. 2020 1 specimen
JRF 9739 ("Tooth Type C")
Allosaurus jimmadseni Chure et al. 2006
Chure and Loewen 2020 1 individual
SDSM 30510, juvenile
Reptilia - Stegosauridae
Stegosaurus sp. Marsh 1877
Turner and Peterson 1999 1 specimen
SDSM 25300
    = Stegosauridae indet. Marsh 1880
Foster et al. 2020
Reptilia
Ornithopoda indet. (Marsh 1881)
Foster 2001 23 specimens
Othnielia sp. Galton 1977
Foster 1996
    = Othnielia rex Marsh 1877
Foster 2001
incl. MWC 5822 (L dentary)
    = Nanosaurus agilis Marsh 1877
Foster et al. 2020
Allosaurus sp. Marsh 1877
adult specimen, teeth, isolated skull bones; JRF 9337
    = Nanosaurus agilis Marsh 1877
Foster et al. 2020
Dryosaurus sp. Marsh 1894
Turner and Peterson 1999
    = Dryosaurus altus Marsh 1878
Foster 2001
    = Nanosaurus agilis Marsh 1877
Foster et al. 2020
Ornithischia indet. Seeley 1888
Turner and Peterson 1999
    = Nanosaurus agilis Marsh 1877
Foster et al. 2020
Apatosaurus sp. Marsh 1877
Foster 1996 1 individual
    = Diplodocinae indet. Janensch 1929
Foster et al. 2020
Diplodocinae indet. Janensch 1929
Foster 1996 1 specimen
either Diplodocus or Barosaurus; SDSM 25258
    = Diplodocus sp. Marsh 1878
Fiorillo 2008
    = Diplodocinae indet. Janensch 1929
Foster et al. 2020
Reptilia - Camarasauridae
Camarasaurus sp. Cope 1877
7 individuals
SDSM 114501, JRF 9584
Reptilia
Pterosauria indet. (Kaup 1834)
Foster et al. 2020 1 specimen
MWC 5809
Crocodylia indet. (Owen 1842)
40 specimens
    = Crocodyliformes indet. Hay 1930
Foster et al. 2020
JRF 9571, 95211
Goniopholis sp. Owen 1842
Foster 2006 1 specimen
MWC 5625 - type (left dentary)
    = Theriosuchus morrisonensis n. sp. Foster 2018
Foster 2018
Reptilia - Goniopholididae
? Goniopholididae indet. Cope 1875
Foster et al. 2020
SDSM 25337
Reptilia - Paramacellodidae
Lacertilia indet. Owen 1842
Foster and Trujillo 2000 1 specimen
    = ? Scincomorpha indet. Camp 1923
Foster 2001
    = cf. Paramacellodus sp. Hoffstetter 1967
Foster et al. 2020
JRF 95102
Reptilia - Pleurosternidae
Dinochelys whitei Gaffney 1979
Foster 2001 45 specimens
Glyptops plicatulus (Cope 1877)
Foster 2001 7 specimens
    = Glyptops ornatus Marsh 1890
Foster et al. 2020
Reptilia - Testudines
Testudines indet. Batsch 1788
55 specimens
Mammalia
Mammalia indet. (Linnaeus 1758)
Foster 2001 7 specimens
Mammalia - Multituberculata - Allodontidae
Allodontidae indet. Marsh 1889
Foster et al. 2020 1 specimen
SDSM 26912
? Psalodon marshi Simpson 1929
Martin and Foster 1998 2 specimens
    = Psalodon marshi Simpson 1929
Foster and Trujillo 2000
Mammalia - Dryolestidae
Dryolestidae indet. Marsh 1879
Foster 2001 2 specimens
Amblotherium megistodon n. sp. Foster et al. 2020
Foster et al. 2020 1 specimen
SDSM 148545, left dentary
Mammalia - Triconodonta
Triconodonta indet. (Osborn 1888)
Foster 2001 1 specimen
Docodonta - Docodontidae
Mammalia indet. Linnaeus 1758
Foster 1996 5 specimens
    = Docodon victor Marsh 1880
Foster et al. 2006
SDSM 60482, partial right dentary with three molars; SDSM 26911, partial right dentary with one molar; SDSM 30492, maxilla fragment with deciduous(?) molar and erupting molar; MWC 5727, maxilla fragment with premolar
Docodon cf. apoxys Rougier et al. 2014
Foster et al. 2020 1 specimen
SDSM 60480, partial left dentary with four molarsSDSM 60480
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Foster and Trujillo 2000 1 specimen
humerus, distal half
Caudata indet. (Scopoli 1777)
Foster et al. 2020
Gastropoda
Gastropoda indet. Cuvier 1795
Foster et al. 2020
Gastropoda - Heterostropha - Valvatidae
Amplovalvata sp. Yen 1952
Foster et al. 2020 1 specimen
JRF 9359
Bivalvia - Unionida - Unionidae
Unionidae indet. Rafinesque 1820
Foster et al. 2020
including one potential new genus
Branchiopoda - Diplostraca
Diplostraca indet. Gerstecker 1866
Foster et al. 2020
Malacostraca
? Malacostraca indet. (Latreille 1802)
Foster et al. 2020 1 specimen
MWC 5640
see common names

Geography
Country:United States State/province:Wyoming County:Crook
Coordinates: 44.5° North, 104.7° West (view map)
Paleocoordinates:39.8° North, 50.3° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Key time interval:Kimmeridgian - Tithonian
Age range of interval:154.80000 - 145.00000 m.y. ago
Stratigraphy
Formation:Morrison
Stratigraphic resolution:group of beds
Stratigraphy comments: two closely spaced beds, Unit 2 and Unit 3
Lithology and environment
Primary lithology:green mudstone
Secondary lithology:planar lamination,gray,green siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "interbedded light green, laminated silstone and green mudstone." "The bone-bearing lithosome is a light greenish-gray, finely laminated siltstone with thinly interbedded claystones"
Environment:pond
Geology comments: pond formed from abandoned stream channel
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils,mesofossils
Spatial orientation:preferred
Preservation of anatomical detail:medium
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:occasional
Collection methods and comments
Collection excludes:some genera
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:SDSM
Collectors:J. Foster
Metadata
Also known as:WY-11, Main Quarry, Mammal Quarry
Database number:49636
Authorizer:M. Carrano, M. Uhen, P. Mannion Enterer:M. Carrano, M. Uhen, J. Tennant
Modifier:M. Carrano Research group:vertebrate
Created:2005-04-21 07:43:30 Last modified:2022-06-08 15:46:50
Access level:the public Released:2005-04-21 07:43:30
Creative Commons license:CC BY
Reference information

Primary reference:
5792.ETE 1555J. 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]

Secondary references:

71691 D. J. Chure and M. A. Loewen. 2020. Cranial anatomy of Allosaurus jimmadseni, a new species from the lower part of the Morrison Formation (Upper Jurassic) of western North America. PeerJ 8:e7803:1-65 [M. Uhen/M. Uhen/M. Carrano]
75727 K. Decker. 2012. Evaluation of Proposed Expansion of the Garden Park Fossil Area National Natural Landmark, Fremont County, Colorado for its Merit in Meeting National Significance Criteria as a National Natural Landmark in Representing Geologic History of the Jurassic Period during the Age of Reptiles in the Southern Rocky Mountain Province, 27 pp. [M. Carrano/M. Carrano]
52045 A. R. Fiorillo. 2008. Lack of variability in feeding patterns of the sauropod dinosaurs Diplodocus and Camarasaurus (Late Jurassic, western USA) with respect to climate as indicated by tooth wear features. In J. T. Sankey & S. Baszio (ed.), Vertebrate Microfossil Assemblages: Their Role in Paleoecology and Paleobiogeography 104-116 [M. Carrano/M. Carrano]
13295ETE J. R. Foster. 1996. Sauropod dinosaurs of the Morrison Formation (Upper Jurassic), Black Hills, South Dakota and Wyoming. Contributions to Geology, University of Wyoming 31(1):1-25 [M. Carrano/M. Carrano/M. Carrano]
15143ETE J. R. Foster. 2001. Taphonomy and paleoecology of a microvertebrate assemblage from the Morrison Formation (Upper Jurassic) of the Black Hills, Crook County, Wyoming. Brigham Young University Geology Studies 46:13-33 [M. Carrano/M. Carrano]
15179ETE J. R. Foster. 2003. Paleoecological analysis of the vertebrate fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain region, U.S.A. New Mexico Museum of Natural History and Science Bulletin 23:1-95 [M. Carrano/M. Carrano]
19565ETE J. R. Foster. 2005. New juvenile sauropod material from western Colorado, and the record of juvenile sauropods from the Upper Jurassic Morrison Formation. In K. Carpenter and V. Tidwell (eds.), Thunder-Lizards: The Sauropodomorph Dinosaurs. Indiana University Press, Bloomington 141-153 [M. Carrano/M. Carrano/M. Carrano]
65164 J. R. Foster. 2006. The mandible of a juvenile goniopholidid (Crocodyliformes) from the Morrison Formation (Upper Jurassic) of Wyoming. In J. R. Foster & S. G. Lucas (ed.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:101-105 [M. Carrano/M. Carrano]
67662 J. R. Foster. 2018. A new atoposaurid crocodylomorph from the Morrison Formation (Upper Jurassic) of Wyoming, USA. Geology of the Intermountain West 5:287-295 [P. Mannion/P. Mannion/M. Carrano]
39692 J. R. Foster and D. J. Chure. 2006. Hindlimb allometry in the Late Jurassic theropod dinosaur Allosaurus, with comments on its abundance and distribution. In J. R. Foster & S. G. Lucas (ed.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:119-122 [M. Carrano/M. Carrano/M. Carrano]
51125 J. R. Foster and M. G. Lockley. 1995. Tridactyl dinosaur footprints from the Morrison Formation (Upper Jurassic) of northeast Wyoming. Ichnos 4(1):35-41 [M. Carrano/M. Carrano]
81844 J. R. Foster and J. E. Martin. 1994. Late Jurassic dinosaur localities in the Morrison Formation of northeastern Wyoming. In G. E. Nelson (ed.), Wyoming Geological Association Forty-Fourth Annual Field Conference. Wyoming Geological Association Guidebook 44:115-126 [M. Carrano/M. Carrano]
17018ETE 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]
75375 J. R. Foster, D. C. Pagnac, and R. K. Hunt-Foster. 2020. An unusually diverse northern biota from the Morrison Formation (Upper Jurassic), Black Hills, Wyoming. Geology of the Intermountain West 7:29-67 [M. Carrano/M. Carrano]
15142ETE 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]
46097 J. R. Foster, K. C. Trujillo, S. K. Madsen and J. E. Martin. 2006. The Late Jurassic mammal Docodon, from the Morrison Formation of The Black Hills, Wyoming: implications for abundance and biogeography of the genus. In J. R. Foster & S. G. Lucas (ed.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:165-169 [P. Mannion/J. Tennant/M. Carrano]
15169ETE J. E. Martin and J. R. Foster. 1998. First Jurassic mammals from the Black Hills, northeastern Wyoming. Modern Geology 23(1-4):381-392 [M. Carrano/M. Carrano]
13281ETE C. E. Turner and F. Peterson. 1999. Biostratigraphy of dinosaurs in the Upper Jurassic Morrison Formation of the Western Interior, U.S.A. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:77-114 [M. Carrano/M. Carrano/M. Carrano]