McLeod Prison (OMNH V706), Tomato Hill: Late/Upper Aptian - Early/Lower Albian, Oklahoma
collected by J. Wilson 1993

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
Osteichthyes indet. Huxley 1880
Cifelli et al. 1997
Mammalia - Kermackiidae
Kermackia texana Slaughter 1971
Davis and Cifelli 2011
teeth
Mammalia - Pappotheriidae
Pappotherium pattersoni Slaughter 1965
Davis and Cifelli 2011
teeth
Slaughteria eruptens Butler 1978
Davis and Cifelli 2011
synonym of Pappotherium pattersoni
teeth
Mammalia - Deltatheroida - Deltatheridiidae
Oklatheridium sp. Davis et al. 2008
Davis and Cifelli 2011
teeth
Oklatheridium szalayi n. gen., n. sp. Davis et al. 2008
Davis et al. 2008 8 specimens
OMNH 62410, a LM2 (holotype); OMNH 62411, LM1; OMNH 61180, LM2; OMNH 63727, RM3; OMNH 33945, Lm1; OMNH 61643, Rm2 or 3; OMNH 33940, Rm2 or 3; OMNH 63728, Rm2 or 3; OMNH 63730, Lm2 or 3
Oklatheridium minax n. sp. Davis and Cifelli 2011
Davis and Cifelli 2011
teeth, including the holotype LM2 (OMNH 33455)
Atokatheridium boreni n. gen., n. sp. Kielan-Jaworowska and Cifelli 2001
Kielan-Jaworowska and Cifelli 2001 12 specimens
12 teeth, including the holotype RM2 (OMNH 61623), M1 (OMNH 61151), M2 (OMNH 61623), M3 (OMNH 63725), 3xm1 (OMNH 63724m 63889, 63890), 5xmx (OMNH 34905, 61181, 61624, 63891, 63892)
Mammalia - Holoclemensiidae
Holoclemensia texana (Slaughter 1968)
Davis and Cifelli 2011
teeth
Mammalia - Eutriconodonta - Triconodontidae
Astroconodon cf. denisoni Patterson 1951
Cifelli et al. 1997
Mammalia - Multituberculata
Multituberculata indet. Cope 1884
Cifelli et al. 1997
two forms
? Paracimexomys crossi n. sp. Cifelli 1997
Reptilia
? Atoposauridae indet. (Gervais 1871)
Cifelli et al. 1997
    = Mesoeucrocodylia indet. Whetstone and Whybrow 1983
Tennant et al. 2016
Bernissartia sp. Dollo 1883
Cifelli et al. 1997
Reptilia - Pholidosauridae
? Pholidosauridae indet. von Zittel and Eastman 1902
Cifelli et al. 1997
Reptilia - Goniopholididae
? Goniopholidae indet. (Cope 1875)
Cifelli et al. 1997
original and current combination Goniopholididae
Reptilia
Ornithischia indet. (Seeley 1888)
Frederickson et al. 2015 1 specimen
OMNH 34881
Tenontosaurus sp. Ostrom 1970
Cifelli et al. 1997 18 individuals
OMNH 16563, 53781, 51091, 50269
Astrodon sp. Johnston 1859
Cifelli et al. 1997
nomen dubium belonging to Macronaria
Reptilia - Theropoda
Theropoda indet. Marsh 1881
Cifelli et al. 1997
six additional forms
Reptilia
? Aves indet. Linnaeus 1758
Cifelli et al. 1997
Reptilia - Dromaeosauridae
cf. Deinonychus sp. Ostrom 1969
Cifelli et al. 1997
five additional forms
Deinonychus antirrhopus Ostrom 1969
Cifelli et al. 1997 1 individual
OMNH 50268
Reptilia - Carcharodontosauridae
Acrocanthosaurus atokensis Stovall and Langston 1950
Cifelli et al. 1997 1 individual
    = Acrocanthosaurus sp. Stovall and Langston 1950
Brinkman et al. 1998
Reptilia - Lacertilia
Lacertilia indet. Owen 1842
Nydam and Cifelli 2002 2 specimens
OMNH 60802, 61132
Reptilia - Paramacellodidae
cf. Paramacellodidae indet. Estes 1983
Nydam and Cifelli 2002 5 specimens
OMNH 34206, 32585, 60595, 32613, 60766
? Paramacellodidae indet. Estes 1983
Cifelli et al. 1997 1 specimen
scincomorph lizard; OMNH 60535
    = Atokasaurus metarsiodon n. gen., n. sp. Nydam and Cifelli 2002
Nydam and Cifelli 2002
Reptilia
? Anguimorpha indet. Fürbringer 1900
Nydam and Cifelli 2002 1 specimen
OMNH 60541
Reptilia - Teiidae
Teiidae indet. Gray 1827
Cifelli et al. 1997 1 specimen
not the same as Ptilotodon; OMNH 61206
Ptilotodon wilsoni n. gen., n. sp. Nydam and Cifelli 2002
Nydam and Cifelli 2002 1 specimen
OMNH 60764
Reptilia
? Scincidae indet. Gray 1825
Cifelli et al. 1997 4 specimens
several forms
    = ? Scincomorpha indet. Camp 1923
Nydam and Cifelli 2002
OMNH 60537-38, 60763, 60765
Reptilia - Pleurosternidae
Glyptops sp. Marsh 1890
Brinkman et al. 1998
Reptilia
Naomichelys sp. Hay 1908
Cifelli et al. 1997
Reptilia - Testudines
Testudines indet. Batsch 1788
Cifelli et al. 1997
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Cifelli et al. 1997
two forms
? Caudata indet. Scopoli 1777
Cifelli et al. 1997
Amphibia - Temnospondyli - Albanerpetontidae
Albanerpeton arthridion Fox and Naylor 1982
Cifelli et al. 1997
Actinopteri - Lepisosteiformes - Lepisosteidae
? Lepisosteidae indet. Cuvier 1825
Cifelli et al. 1997
Actinopteri - Semionotiformes - Semionotidae
? Semionotidae indet. Woodward 1890
Cifelli et al. 1997
Actinopteri - Amiiformes - Amiidae
? Amiidae indet. Huxley 1861
Cifelli et al. 1997
Actinopteri - Pycnodontiformes - Pycnodontidae
? Palaeobalistum sp. Blainville 1818
Cifelli et al. 1997
Actinopteri - Pycnodontiformes
Gyronchus dumblei
Cifelli et al. 1997
Chondrichthyes - Hybodontiformes - Lonchidiidae
Lissodus anitae (Thurmond 1971)
Cifelli et al. 1997
original and current combination Lonchidion anitae
Chondrichthyes - Hybodontiformes - Hybodontidae
Hybodus butleri Thurmond 1971
Cifelli et al. 1997
recombined as Meristodonoides butleri
? Hybodus sp. Agassiz 1834
Cifelli et al. 1997
see common names

Geography
Country:United States State/province:Oklahoma County:Atoka
Coordinates: 34.2° North, 95.8° West (view map)
Paleocoordinates:31.6° North, 50.6° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
*Period:Late/Upper Cretaceous
*International age/stage:Late/Upper Aptian - Early/Lower Albian
Key time interval:Late/Upper Aptian - Early/Lower Albian
Age range of interval:119.50000 - 109.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Trinity Formation:Antlers Member:middle
Stratigraphic resolution:group of beds
Stratigraphy comments: said to be late Aptian to early Albian
microvertebrates (V706) are from "1-1.5 m below the dinosaur-bearing horizon" (Nydam and Cifelli 2002b)
Lithology and environment
Primary lithology:concretionary,gray,green,red claystone
Secondary lithology:lenticular,brown,yellow poorly lithified sandstone
Lithology description: "red and gray/green claystone with intermittent lenses of poorly consolidated sandstones and numerous carbonate concretions" (Nydam and Cifelli 2002b)
Environment:"floodplain"
Geology comments: "overbank deposit associated with a meandering fluvial system" (Nydam and Cifelli 2002b)
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Articulated whole bodies:some
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:many
Fragmentation:occasional
Bioerosion:occasional
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:bulk,selective quarrying,mechanical,sieve,field collection
Reason for describing collection:taxonomic analysis
Collectors:J. Wilson Collection dates:1993
Taxonomic list comments:see also Nydam et al. 1997
Metadata
Also known as:Howard McLeod Correctional Center; HMCC; McLeod 2
Database number:14392
Authorizer:J. Alroy, M. Carrano, R. Benson, P. Mannion Enterer:J. Alroy, M. Carrano, R. Benson, P. Mannion
Modifier:M. Carrano Research group:vertebrate
Created:1998-09-21 00:00:00 Last modified:2023-04-20 09:39:05
Access level:the public Released:1998-09-21 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1212. R. L. Cifelli. 1997. First notice on Mesozoic mammals from Oklahoma. Oklahoma Geology Notes 57(1):4-17 [J. Alroy/J. Alroy/J. Ju]

Secondary references:

12427ETE D. B. Brinkman, R. L. Cifelli, and N. J. Czaplewski. 1998. First occurrence of Deinonychus antirrhopus (Dinosauria: Theropoda) from the Antlers Formation (Lower Cretaceous: Aptian-Albian) of Oklahoma. Oklahoma Geological Survey Bulletin 146:1-27 [M. Carrano/M. Carrano/M. Carrano]
1219ETE R. L. Cifelli, J. D. Gardner, R. L. Nydam and D. L. Brinkman. 1997. Additions to the vertebrate fauna of the Antlers Formation (Lower Cretaceous), southeastern Oklahoma. Oklahoma Geology Notes 57(4):124-131 [J. Alroy/J. Alroy/M. Carrano]
78851 K. L. Davies. 2002. The McLeod sites (a supplement to Field Trip 2). In J. G. Pittman, G. L. Bell, R. L. Cifelli, & W. Langston (eds.), Society of Vertebrate Paleontology, 62nd Annual Meeting. Field Trip Guidebook. Field Trip 2. Cretaceous of Southeast Oklahoma, Southwest Arkansas and Northeast Texas. Oklahoma Geological Survey Open-File Report 10-2002:1-7 [M. Carrano/M. Carrano]
39673 B. M. Davis, R. L. Cifelli, and Z. Kielan-Jaworowska. 2008. 1. Earliest Evidence of Deltatheroida (Mammalia: Metatheria) from the Early Cretaceous of North America. Mammalian Evolutionary Morphology: A Tribute to Frederick S. Szalay 3-24 [R. Benson/R. Benson]
38296 B. M. Davis and R. L. Cifelli. 2011. Reappraisal of the tribosphenidan mammals from the Trinity Group (Aptian-Albian) of Texas and Oklahoma. Acta Palaeontologica Polonica 56(3):441-462 [R. Benson/R. Benson]
75889 J. A. Frederickson, J. E. Cohen, and R. L. Cifelli. 2015. A second ornithischian dinosaur from the Antlers Formation (Lower Cretaceous) of southeastern Oklahoma. Proceedings of the Oklahoma Academy of Sciences 95:64-66 [M. Carrano/M. Carrano]
84518 J. A. Frederickson, M. H. Engel, and R. A. Cifelli. 2020. Ontogenetic dietary shifts in Deinonychus antirrhopus (Theropoda; Dromaeosauridae): insights into the ecology and social behavior of raptorial dinosaurs through stable isotope analysis. Palaeogeography, Palaeoclimatology, Palaeoecology 552 [M. Carrano/M. Carrano]
6098 Z. Kielan-Jaworowska and R. L. Cifelli. 2001. Primitive boreosphenidan mammal (?Deltatheroida) from the Early Cretaceous of Oklahoma. Acta Palaeontologica Polonica 46(3):377-391 [J. Alroy/J. Alroy/J. Alroy]
6715 R. L. Nydam and R. L. Cifelli. 2002. Lizards from the Lower Cretaceous (Aptian-Albian) Antlers and Clovery formations. Journal of Vertebrate Paleontology 22(2):286-298 [J. Alroy/J. Alroy/J. Alroy]
25845ETE B. T. Roach and D. L. Brinkman. 2007. A reevaluation of cooperative pack hunting and gregariousness in Deinonychus antirrhopus and other nonavian theropod dinosaurs. Bulletin of the Peabody Museum of Natural History 48(1):103-138 [M. Carrano/M. Carrano]
59838 J. P. Tennant, P. D. Mannion, and P. Upchurch. 2016. Evolutionary relationships and systematics of Atoposauridae (Crocodylomorpha: Neosuchia): implications for the rise of Eusuchia. Zoological Journal of the Linnean Society 177:854-936 [P. Mannion/P. Mannion]