Miller's Ranch Quarry (Triassic of the United States)

Also known as Post Quarry, Dockum Group, ETE Locality 1583, MOTT VPL 3624

Where: Garza County, Texas (33.5° N, 101.3° W: paleocoordinates 8.2° N, 41.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Cooper Canyon Formation (Dockum Group), Norian (228.0 - 208.5 Ma)

• 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.

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; red mudstone and sandstone

• 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
• red mudstone facies. ETE rock type adj: "thick,red", ETE lithology comments: 0. "A thick red mudstone unit"

Size classes: macrofossils, mesofossils

Collection methods: quarrying, mechanical,

• 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:

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

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13273: authorized by John Alroy, entered by Robin Whatley on 12.02.2002, edited by Matthew Carrano, Richard Butler and Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

• "...various unknown microvertebrates were recovered..."
Bivalvia
 Unionata -
"Unionoida indet." = Unionida4
"Unionoida indet." = Unionida4 Stoliczka 1871 clam
Osteichthyes
 Temnospondyli -
? Rileymillerus cosgriffi1 Bolt and Chatterjee 2000 tetrapod
TTU P-9170, vertebrae possibly referable to Rileymillerus
Rileymillerus cosgriffi n. gen. n. sp.1 Bolt and Chatterjee 2000 tetrapod
TTU P 9168 (holotype), nearly complete skull
 Temnospondyli - Metoposauridae
Apachesaurus gregorii9 Hunt 1993 tetrapod
TTU P 9216, partial skull and mandible
Reptilia
 Eosuchia -
cf. Trilophosaurus sp.9 Case 1928 archosauromorph
TTU P-10698, tooth
Trilophosaurus sp.9 Case 1928 archosauromorph
TTU P-10600, radius
"Trilophosaurus dornorum" = Trilophosaurus jacobsi10 Murry 1987 archosauromorph
TTU P-9497, tooth
 Ornithodira -
? Ornithodira indet.9 Gauthier 1986 ornithodiran
TTU P-10110-10198, "Procoelosaurus brevicollis"; TTU P10085-10095, 9489, 9490, "Pteromimus longicollis"; 57 additional specimens (mostly vertebrae)
 Dinosauromorpha - Lagerpetonidae
Dromomeron gregorii14 Nesbitt et al. 2009 ornithodiran
TTU-P18331, TTU-P20046, fragments of left femur
 Dinosauromorpha -
Dinosauriformes indet.11 Novas 1992 ornithodiran
TTU P-11127, Silesaurus-like tibia
 Saurischia -
Saurischia indet.11 Seeley 1888 saurischian
TTU P-10082, partial pelvis, similar to Staurikosaurus
Theropoda indet.11 Marsh 1881 theropod
TTU P-11044, tibia.
Coelophysoidea indet.11 Holtz 1994 coelophysoid
TTU P-10071, right ilium
Protoavis texensis n. gen. n. sp.5 Chatterjee 1991 theropod
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)
 Dinosauromorpha - Silesauridae
Soumyasaurus aenigmaticus n. gen. n. sp.15, Technosaurus smalli n. gen. n. sp.3
Soumyasaurus aenigmaticus n. gen. n. sp.15 Sarigul et al. 2018 ornithodiran
TTU-P11254
Technosaurus smalli n. gen. n. sp.3 Chatterjee 1984 ornithodiran
 Pseudosuchia - Shuvosauridae
"Shuvosaurus inexpectatus n. gen. n. sp." = Shuvosaurus inexpectatus6, "Chatterjeea elegans n. gen. n. sp." = Shuvosaurus inexpectatus8
"Shuvosaurus inexpectatus n. gen. n. sp." = Shuvosaurus inexpectatus6 Chatterjee 1993 archosaur
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." = Shuvosaurus inexpectatus8 Chatterjee 1993 archosaur
TTU P-9001 (holotype), postcranial skeleton
 Pseudosuchia - Stagonolepididae
Stagonolepididae indet.9 archosaur
TTU P-9205, 9206, 9227, 9171
Desmatosuchus smalli n. sp.13 Parker 2005 archosaur
TTU P 9024 (holotype), 9023, 9025, 9170, 9207 (paratypes), 9204, 9225, 9226, 9229, 9416 (in part), 9419, 9420 (in part), 10083; 12 DMNH specimens
Paratypothorax sp.16 Long and Ballew 1985 archosaur
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 sp.9 Cope 1875 archosaur
TTU P-9214, partial skull & skeleton; previously listed as TTU P-9208
 Loricata - Sphenosuchidae
Sphenosuchidae indet.9 Huene 1922 crocodilian
TTU P-9466, 11277, 11443, 11444, premaxilla and femora
 Loricata - Rauisuchidae
Postosuchus kirkpatricki n. gen. n. sp.4
Postosuchus kirkpatricki n. gen. n. sp.4 Chatterjee 1985 rauisuchid
 Phytosauria - Parasuchidae
Leptosuchus cf. crosbiensis9 Case 1922 archosaur
TTU P-9234, skull
 Phytosauria -
"Parasuchia indet." = Phytosauria9
"Parasuchia indet." = Phytosauria9 Jaeger 1828 archosaur
TTU P-9231, 9236, forelimb elements
 Protorosauria - Protorosauridae
Malerisaurus sp.9 Chatterjee 1980 archosauromorph
TTU P-11338, cervical vertebra
 Rhynchocephalia -
Sphenodontia indet.9 rhynchocephalian
TTU P-9473, mandible
 Rhynchocephalia - Clevosauridae
cf. Clevosaurus sp.9 Swinton 1939 rhynchocephalian
TTU P-9472, premaxilla
 Diapsida - Drepanosauridae
? Drepanosauridae indet.12 Berman and Reisz 1992 diapsid
TTU P-9201, Cervical vertebrae assigned to "Protoavis texensis"
Drepanosauridae indet.9 Berman and Reisz 1992 diapsid
TTU P-11237, 9604, 9606, vertebrae and scapulocoracoids
Osteichthyes
 Therapsida - Tritheledontidae
Pachygenelus milleri n. sp.2 Chatterjee 1983 therapsid
 Dicynodontia -
Kannemeyeriiformes indet.7 Huene 1948 dicynodont