Miller's Ranch Quarry: Norian, Texas
collected by S. Chatterjee 1977–

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Unionida
Unionoida indet. Stoliczka 1871
Chatterjee 1985
corrected as Unionida
Amphibia - Temnospondyli
Labyrinthodontia indet. Owen 1859
Chatterjee 1985 1 individual
TTU P 9168 (holotype), nearly complete skull
    = Latiscopus sp. Wilson 1948
Small 1989
    = Rileymillerus cosgriffi n. gen., n. sp. Bolt and Chatterjee 2000
Bolt and Chatterjee 2000
? Rileymillerus cosgriffi Bolt and Chatterjee 2000
Bolt and Chatterjee 2000 1 specimen
TTU P-9170, vertebrae possibly referable to Rileymillerus
    = Rileymillerus cosgriffi Bolt and Chatterjee 2000
Martz et al. 2013
Amphibia - Temnospondyli - Metoposauridae
Metoposauridae indet. Watson 1919
Chatterjee 1985 1 specimen
TTU P 9216, partial skull and mandible
    = Dictyocephalus sp. Ehrenberg 1860
Small 1989
    = Apachesaurus gregorii Hunt 1993
Martz 2008
Anomodontia
Placerias sp. Lucas 1904
Lehman and Chatterjee 2005 1 specimen
    = Dicynodontia indet. Owen 1859
Martz 2008
TTU P-9417, femur
    = Kannemeyeriiformes indet. Huene 1948
Fröbisch 2009
    = ? Dicynodontia indet. Owen 1859
Martz et al. 2013
Tritheledontidae
Ictidosauria indet. Broom 1929
3 specimens
    = Pachygenelus milleri n. sp. Chatterjee 1983
Chatterjee 1983
nomen dubium belonging to Tritheledontidae
TTU P 9020 (holotype), right dentary; TTU P-9245, tooth in partial mandible; TTU P-10826, isolated crown
Reptilia
cf. Trilophosaurus sp. Case 1928
Martz 2008 1 specimen
TTU P-10698, tooth
Trilophosaurus sp. Case 1928
Martz 2008 1 specimen
TTU P-10600, radius
Protorosauria indet. Huxley 1871
Chatterjee 1985 1 specimen
TTU P-11338, cervical vertebra
    = Malerisaurus sp. Chatterjee 1980
Martz 2008
    = ? Malerisaurus langstoni Chatterjee 1986
Martz et al. 2013
synonym of Trilophosaurus buettneri
Trilophosaurus dornorum Mueller and Parker 2006
Mueller and Parker 2006 1 specimen
synonym of Trilophosaurus jacobsi
TTU P-9497, tooth
? Ornithodira indet. Gauthier 1986
Martz 2008 158 specimens
TTU P-10110-10198, "Procoelosaurus brevicollis"; TTU P10085-10095, 9489, 9490, "Pteromimus longicollis"; 57 additional specimens (mostly vertebrae)
    = Archosauriformes indet. Gauthier 1986
Martz et al. 2013
"procoelous vertebrate taxa A and B"
Reptilia - Sphenosuchidae
Sphenosuchidae indet. Huene 1922
Martz 2008 4 specimens
TTU P-9466, 11277, 11443, 11444, premaxilla and femora
Reptilia
Postosuchus sp. Chatterjee 1985
2 individuals
    = Postosuchus kirkpatricki n. gen., n. sp. Chatterjee 1985
Chatterjee 1985
TTU P-9000 (holotype), 9002 (paratype) skulls and postcrania
Reptilia - Stagonolepididae
Stagonolepididae indet. Lydekker 1887
Martz 2008 4 specimens
TTU P-9205, 9206, 9227, 9171
Reptilia
Paratypothorax sp. Long and Ballew 1985
Small 1989 20 specimens
TTU P-9169, 9214, 9215, 9416 (in part), 11599, 12540; DMNH 9894, 9896, 9900, 9914, 9919, 9921, 9922, 9927, 9928, 9931, 9934, 9939, 9942, 9986
Typothorax coccinarum Cope 1875
Small 1989 1 individual
TTU P-9214, partial skull & skeleton; previously listed as TTU P-9208
    = Typothorax sp. Cope 1875
Martz 2008
Desmatosuchus haplocerus (Cope 1892)
Small 1989 24 specimens
TTU P 9024 (holotype), 9023, 9025, 9170, 9207 (paratypes), 9204, 9225, 9226, 9229, 9416 (in part), 9419, 9420 (in part), 10083; 12 DMNH specimens
    = Desmatosuchus smalli n. sp. Parker 2005
Parker 2005
Calyptosuchus wellesi Long and Ballew 1985
Martz et al. 2013 1 specimen
TTU-P09420 (in part) left and right paramedian osteoderms
Reptilia - Shuvosauridae
Shuvosaurus inexpectatus n. gen., n. sp. Chatterjee 1993
Chatterjee 1993 16 specimens
TTU P-9280 (holotype), skull; TTU P-9282 (paratype), skull; TTU P-9281 (paratype), cranial elements; TTU P-9021 (partim), partial lower jaw originally assigned to Technosaurus; TTU P-9235, vertebrae; TTU P-9003-9011, specimens originally assigned to Postosuchus kirkpatricki; TTU P-11045, scapula; TTU P-10969, quadrate
Chatterjeea elegans n. gen., n. sp. Long and Murry 1995
Long and Murry 1995 1 specimen
synonym of Shuvosaurus inexpectatus
TTU P-9001 (holotype), postcranial skeleton
Reptilia
Parasuchia indet. Huxley
Martz 2008 2 specimens
synonym of Phytosauria
TTU P-9231, 9236, forelimb elements
Reptilia - Parasuchidae
Leptosuchus cf. crosbiensis Case 1922
Martz 2008 1 individual
TTU P-9234, skull
    = Leptosuchus sp. Case 1922
Martz et al. 2013
Reptilia
Dinosauriformes indet. Novas 1992
Nesbitt and Chatterjee 2008 1 individual
TTU P-11127, Silesaurus-like tibia
Ornithischia indet. Seeley 1888
1 individual
    = Technosaurus smalli n. gen., n. sp. Chatterjee 1984
Chatterjee 1984
TTU P 9021 (holotype), cranial elements & dorsal vertebra
Dinosauriformes indet. Novas 1992
Agnolin et al. 2016 1 specimen
    = Soumyasaurus aenigmaticus n. gen., n. sp. Sarigul et al. 2018
Sarigul et al. 2018
TTU-P11254
Reptilia - Herrerasauridae
Saurischia indet. (Seeley 1888)
Nesbitt and Chatterjee 2008 1 individual
TTU P-10082, partial pelvis, similar to Staurikosaurus
    = Herrerasauridae indet. Benedetto 1973
Martz et al. 2013
Reptilia
Protoavis texensis n. gen., n. sp. Chatterjee 1991
Chatterjee 1991 3 individuals
TTU P 9200 (holotype), partial skull and skeleton; TTU P 9201, partial skull/skeleton; TTU P 9350-9380, isolated elements. May represent a "fauna" of multiple taxa. However, according to Nesbitt et al. (2007) theropod elements include the astragalus/calcaneum (TTU P 9201), femur (TTU P 9200) and possibly the braincase (TTU P 9200)
Coelophysoidea indet. Holtz 1994
Nesbitt and Chatterjee 2008 1 individual
TTU P-10071, right ilium
    = Neotheropoda indet. Bakker 1986
Martz et al. 2013
Theropoda indet. (Marsh 1881)
Nesbitt and Chatterjee 2008 1 specimen
TTU P-11044, tibia.
    = Neotheropoda indet. Bakker 1986
Martz et al. 2013
Dromomeron gregorii Nesbitt et al. 2009
Sarıgül 2016 3 specimens
TTU-P18331, TTU-P20046, fragments of left femur; TTU-P11282, complete left femur
Drepanosauridae indet. Berman and Reisz 1992
Martz 2008 3 specimens
TTU P-11237, 9604, 9606, vertebrae and scapulocoracoids
    = Simiosauria indet. Senter 2004
Martz et al. 2013
Reptilia - Sphenodontia
Sphenodontia indet. (Jaekel 1910)
Martz 2008 1 specimen
TTU P-9473, mandible
Reptilia - Clevosauridae
cf. Clevosaurus sp. Swinton 1939
Martz 2008 1 specimen
TTU P-9472, premaxilla
    = Clevosauridae indet. Fraser 1993
Martz et al. 2013
Reptilia - Drepanosauridae
? Drepanosauridae indet. Berman and Reisz 1992
Nesbitt et al. 2007
TTU P-9201, Cervical vertebrae assigned to "Protoavis texensis"
see common names

Geography
Country:United States State/province:Texas County:Garza
Coordinates: 33.5° North, 101.3° West (view map)
Paleocoordinates:8.2° North, 41.5° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Norian 10 m.y. bin:Triassic 4
*Period:Late/Upper Triassic
*International age/stage:Carnian - Rhaetian
Key time interval:Norian
Age range of interval:228.00000 - 208.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Dockum Formation:Cooper Canyon
Stratigraphic resolution:bed
Stratigraphy comments: About 50 metres above the contact between the top of the Trujillo Sandstone and the base of the Cooper Canyon Formation and can be correlated to lithologic unit 9 of the nearby type section of the Cooper Canyon Formation. Upper part of the "lower unit" of the formation.
Lithology and environment
Primary lithology:red mudstone
Secondary lithology:"cross stratification" sandstone
Includes fossils?Y
Lithology description: red mudstone facies. ETE rock type adj: "thick,red", ETE lithology comments: 0. "A thick red mudstone unit"
Environment:"floodplain"
Geology comments: Trough-shaped cross-bedding and slickensides present in the quarry sediments. ETE sed env 1: ., ETE sed env 2: floodplain ETE event: flood, ETE env comment: flash flood
Taphonomy
Modes of preservation:body
Lagerst�tten type:concentrate
Degree of concentration:-single event
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Abundance in sediment:common
Articulated whole bodies:none
Associated major elements:many
Disassociated major elements:many
Disassociated minor elements:many
Size sorting:poor
Temporal resolution:snapshot
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:S. Chatterjee Collection dates:1977–
Collection method comments: The quarry is 90 x 90 m in size and the bone bed is 30 cm thick. "...a diverse mixture of massive and delicate elements...found entirely in the mudstone, associated, but disarticulated." ETE Size: .; ETE reference list: 701, 698, 696, 692, 690, 686, 685, 731, 684, 729, 730, 872, 873, 874, 875, 869, 870, 871, 868, 867, 866, 865, 864, 863, 862, 861, 860, 852, 734, 775, 856, 859, ; ETE museum list:

Taxonomic list comments:"...various unknown microvertebrates were recovered..."
Metadata
Also known as:Post Quarry, Dockum Group, ETE Locality 1583, MOTT VPL 3624
Database number:13273
Authorizer:J. Alroy, A. Dunhill, M. Carrano, R. Butler Enterer:R. Whatley, R. Butler, B. Allen, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2002-02-12 13:17:12 Last modified:2021-11-15 16:05:20
Access level:the public Released:2002-02-12 13:17:12
Creative Commons license:CC BY
Reference information

Primary reference:

63730. Anonymous. 1983. Dinosaur ancestors unearthed in Texas. Science News 124(23):357 [M. Carrano/M. Carrano]

Secondary references:

76334 F. L. Agnolin, V. Sarigül, and S. Chatterjee. 2016. A new dinosauriform from the Upper Triassic of Texas and its implications on the origin of the avian-like braincase. XXX Jornadas Argentinas de Paleontología de Vertebrados. Resúmenes. Ameghiniana 53(6 (suppl.)):59 [M. Carrano/M. Carrano/M. Carrano]
29593 J. R. Bolt and S. Chatterjee. 2000. A new temnospondyl amphibian from the Late Triassic of Texas. Journal of Paleontology 74(4):670-683 [R. Butler/R. Butler]
29595 S. Chatterjee. 1983. An ictidosaur fossil from North America. Science 220:1151-1153 [R. Butler/R. Butler]
29594 S. Chatterjee. 1984. A new ornithischian dinosaur from the Triassic of North America. Naturwissenschaften 71:630-631 [R. Butler/R. Butler]
44005% 26680S. Chatterjee. 1985. Postosuchus, a new thecodontian reptile from the Triassic of Texas and the origin of tyrannosaurs. Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences 309(1139):395-460 [J. Alroy/R. Whatley/W. Gearty]
36775ETE S. Chatterjee. 1991. Cranial anatomy and relationships of a new Triassic bird from Texas. Philosophical Transactions of the Royal Society of London B 332:277-342 [M. Carrano/M. Carrano]
19328ETE S. Chatterjee. 1993. Shuvosaurus, a new theropod: an unusual theropod dinosaur from the Triassic of Texas. National Geographic Research and Exploration 9(3):274-285 [M. Carrano/M. Carrano/M. Carrano]
29596 S. Chatterjee. 1995. The Triassic bird Protoavis. Archaeopteryx 13:15-31 [R. Butler/R. Butler]
29603 B. Davidow-Henry. 1989. Small metoposaurid amphibians from the Triassic of western North America and their significance. In S. G. Lucas and A. P. Hunt (eds.), Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History, Albuquerque, New Mexico 278-292 [R. Butler/R. Butler/R. Butler]
33223 J. Fröbisch. 2009. Composition and similarity of global anomodont-bearing tetrapod faunas. Earth-Science Reviews 95:119-157 [R. Butler/R. Butler]
24941ETE A. B. Heckert and S. G. Lucas. 2006. Micro- and small vertebrate biostratigraphy and biochronology of the Upper Triassic Chinle Group, southwestern USA. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:94-104 [M. Carrano/M. Carrano/P. Wagner]
32304 R. B. Irmis, W. G. Parker, S. J. Nesbitt and J. Liu. 2007. Early ornithischian dinosaurs: the Triassic record. Historical Biology 19(1):3-22 [R. Butler/R. Butler/M. Carrano]
19338ETE T. M. Lehman and S. Chatterjee. 2005. Depositional setting and vertebrate biostratigraphy of the Triassic Dockum Group of Texas. Journal of Earth Systems Science 114(3):325-351 [M. Carrano/M. Carrano]
14122ETE R. A. Long and P. A. Murry. 1995. Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254 [M. Carrano/M. Carrano/P. Wagner]
29602 J. W. Martz. 2008. Lithostratigraphy, chemostratigraphy, and vertebrate biostratigraphy of the Dockum Group (Upper Triassic), of southern Garza County, West Texas. Unpublished PhD thesis, Texas Tech University. 1-504 [R. Butler/R. Butler/R. Butler]
78487 J. W. Martz, B. Mueller, S. J. Nesbitt, M. R. Stocker, W. G. Parker, M. Atanassov, N. C. Fraser, J. Weinbaum, and J. R. Lehane. 2013. A taxonomic and biostratigraphic re-evaluation of the Post Quarry vertebrate assemblage from the Cooper Canyon Formation (Dockum Group, Upper Triassic) of southern Garza County, western Texas. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 103:339-364 [M. Carrano/M. Carrano]
70805 J. W. Martz and B. J. Small. 2019. Non-dinosaurian dinosauromorphs from the Chinle Formation (Upper Triassic) of the Eagle Basin, northern Colorado: Dromomeron romeri (Lagerpetidae) and a new taxon, Kwanasaurus williamparkeri (Silesauridae). PeerJ 7:e7551:1-71 [M. Carrano/M. Carrano/M. Carrano]
29613 B. D. Mueller and W. G. Parker. 2006. A new species of Trilophosaurus (Diapsida: Archosauromorpha) from the Sonsela Member (Chinle Formation) of Petrified Forest National Park, Arizona. In W. G. Parker, S. R. Ash & R. B. Irmis (eds.), A Century of Research at Petrified Forest National Park, 1906-2006: Geology and Paleontology. Museum of Northern Arizona Bulletin 62:119-125 [R. Butler/R. Butler/R. Butler]
78626 P. A. Murry. 1987. Notes on the stratigraphy and paleontology of the Upper Triassic Dockum Group. Journal of the Arizona-Nevada Academy of Science 22:7-84 [M. Carrano/M. Carrano]
58720 P. A. Murry and R. A. Long. 1997. Dockum Group. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 191-193 [M. Carrano/M. Carrano]
29586 S. J. Nesbitt and S. Chatterjee. 2008. Late Triassic dinosauriforms from the Post Quarry and surrounding areas, west Texas, USA. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 249(2):143-156 [R. Butler/R. Butler]
24249ETE S. J. Nesbitt, R. B. Irmis, and W. G. Parker. 2007. A critical re-evaluation of the Late Triassic dinosaur taxa of North America. Journal of Systematic Palaeontology 5(2):209-243 [M. Carrano/M. Carrano]
16667ETE W. G. Parker. 2005. A new species of the Late Triassic aetosaur Desmatosuchus (Archosauria: Pseudosuchia). Comptes Rendus Palevol 4:327-340 [M. Carrano/M. Carrano]
28035 S. Renesto. 2000. Bird-like head on a chameleon body: new specimens of the enigmatic diapsid reptile Megalancosaurus from the Late Triassic of Northern Italy. Rivista Italiana di Paleontologia e Stratigrafia 106:157-180 [R. Butler/R. Butler]
66756 V. Sarıgül. 2016. New basal dinosauromorph records from the Dockum Group of Texas, USA. Palaeontologia Electronica 19(2):21A [A. Dunhill/B. Allen]
67237 V. Sarigul, F. Agnolin, and S. Chatterjee. 2018. Description of a multitaxic bone assemblage from the Upper Triassic Post Quarry of Texas (Dockum Group), including a new small basal dinosauriform taxon. Historia Natural 8(1):5-24 [G. Lloyd/G. Lloyd]
5937ETE 1718B. Small. 1989. Post Quarry. In S. G. Lucas and A. P. Hunt (eds.), Dawn of the Age of Dinosaurs in the American Southwest, New Mexico Museum of Natural History, Albuquerque 145-148 [A. Behrensmeyer/A. Behrensmeyer/M. Carrano]
12954ETE B. J. Small. 1989. Aetosaurs from the Upper Triassic Dockum Formation, Post Quarry, west Texas. In S. G. Lucas and A. P. Hunt (eds.), Dawn of the Age of Dinosaurs in the American Southwest, New Mexico Museum of Natural History, Albuquerque 301-308 [M. Carrano/M. Carrano/M. Carrano]
29597 B. J. Small. 2002. Cranial anatomy of Desmatosuchus haplocerus (Reptilia: Archosauria: Stagonolepidae). Zoological Journal of the Linnean Society 136:97-111 [R. Butler/R. Butler]
35610 J. C. Weinbaum. 2011. The skull of Postosuchus kirkpatricki (Archosauria: Paracrocodyliformes) from the Upper Triassic of the United States. PaleoBios 30(1):18-44 [R. Butler/R. Butler]