Billingsley Bonebed, MNA 360: Norian, Arizona

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Trilophosaurus cf. buettneri Case 1928
90 fragments
MNA V7065-7069, mandibular fragments. MNA 7070-7071, quadrate condyles. MNA V7072-7074, four complete and 78 fragmentary quadrate condyles
    = Archosauromorpha indet.
Spielmann et al. 2007
Chondrichthyes - Hybodontiformes - Acrodontidae
Reticulodus synergus Murry and Kirby 2002
Murry and Kirby 2002 1482 elements
MNA V6062-V6069, 6822-6830, 6839, 6070-6073, 6040-6843, 6847, crowns
Osteichthyes
Osteichthyes informal Morphotype A
23 elements
"Ichthyolith Morphotype A"; MNA V7049-7050, isolated denticles
Actinopteri - Perleidiformes - Perleididae
Perleididae indet. Brough 1931
5 fragments
MNA V7013, dermal bone fragment. MNA V6999-7002, toothplate fragments
Actinopteri - Semionotiformes - Semionotidae
cf. Semionotus sp. Agassiz 1832
710 elements
MNA V6715, dentalosplenial with teeth. MNA 7014, jaw fragment. MNA V7015-7017, 3 coronoid fragments. MNA V7018, partial cleithrum. MNA V7019-7042 (in part), scales. MNA V7044, 700 scales
Palaeonisciformes - Redfieldiidae
Redfieldiidae indet. Hutchinson 1973
MNA V6953-6954, fragmentary dermal bones. Scales catalogued under MNA V6957-6995 (some from another locality)
Palaeonisciformes - Palaeoniscidae
Turseodus cf. dolorensis Schaeffer 1967
8 elements
MNA V6848-6849, V6860-6865, flank scales
Reptilia - Procolophonidae
Procolophonidae indet. Lydekker 1889
Spielmann et al. 2007 1 element
MNA V7064, partial tooth.
Reptilia
Anchisauria indet. Galton and Upchurch 2004
13 elements
MNA V7242-7252, V7261-7262, teeth
    = Archosauriformes indet. Gauthier 1986
Butler et al. 2006
? Ceratosauria indet. (Marsh 1884)
5 elements
MNA V7233, V7234-7236, teeth. MNA V7237, astragalus
    = Theropoda indet. Marsh 1881
Kirby 1993
Reptilia - Parasuchidae
Pseudopalatus pristinus Mehl 1928
2 individuals
Abundant material, including MNA V3485 (nearly complete skull), V1596-1600, 1601-1605, 1961-1962, 1965, 1969, 1970-1981, 1983, 1985-1988, 1991-2000, 3400, 3434, 3480-3483, 3485-3494, 3496-3497, 5198-5199, 7074-7079, 7082-7087, 7090-7104, cranial and postcranial elements, at least two individuals
    = Pseudopalatus buceros Cope 1881
Spielmann et al. 2007
recombined as Machaeroprosopus buceros
? Pseudopalatus sp. Mehl 1928
26 elements
MNA V7085, 7129-7130, 7134-7138, 7143-7148, 7155-7161, 7163, 7166-7168, 7212-7213, cranial and postcranial elements
    = Pseudopalatus buceros Cope 1881
Spielmann et al. 2007
recombined as Machaeroprosopus buceros
Reptilia - Shuvosauridae
Shuvosauridae indet. Chatterjee 1993
Spielmann et al. 2007 1 element
MNA V5615, femur
cf. Chatterjeea sp. Long and Murry 1995
Kirby 1993
synonym of Shuvosaurus
Reptilia
Typothorax coccinarum Cope 1875
33 elements
MNA V5532-5534, 5539, 5542-5544, 5553, 5560, 5583, 5587, 5590-5593, 6704, 6751, paramedian plates. MNA V5546-5551, 5554-5558, 5567, 6703, lateral plates. MNA V5538, centrum. MNA V5537, rib. MNA V5536, astragalus
Reptilia - Sphenosuchidae
? Sphenosuchidae indet. Huene 1922
MNA V5596, partial femur. MNA V5594-95, V7214-7219, fragmentary centra. MNA V7224, isolated teeth
Reptilia
cf. Postosuchus sp. Chatterjee 1985
8 elements
MNA V5541, distal tibia. MNA V6821, sacral centrum. MNA V6736-6737, 6749, centra. MNA V6728, caudal neural arch. MNA V5607, V5619, teeth
Reptilia - Sphenodontidae
Sphenodontidae indet. Cope 1871
6 fragments
MNA V7058-7063, jaw fragments
Reptilia - Kuehneosauridae
Diapsida indet. (Osborn 1903)
MNA V6714, V6722-6725, postcrania. MNA V7270-7275, jaw fragments
    = Kuehneosauridae indet. Romer 1966
Kirby 1993
Coelacanthimorpha - Coelacanthiformes - Mawsoniidae
? Chinlea sorenseni Schaeffer 1967
4 elements
MNA V7045-7048, isolated quadrates
    = ? Chinlea sp. Schaeffer 1967
Kirby 1993
Bivalvia - Unionida - Unionidae
Unio sp. Philipsson 1788
17 elements
MNA N9282, disarticulated valves
see common names

Geography
Country:United States State/province:Arizona County:Coconino
Coordinates: 35.7° North, 111.1° West (view map)
Paleocoordinates:11.5° North, 49.3° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Norian 10 m.y. bin:Triassic 4
Key time interval:Norian
Age range of interval:227.00000 - 208.50000 m.y. ago
Stratigraphy
Formation:Chinle Member:Owl Rock
Stratigraphic resolution:bed
Stratigraphy comments: Surrounds poorly defined Norian-Rhaetian boundary. Kent et al. 2019 state the boundary falls within magnetozone PF1r which corresponds to chron polarity E17 which is approximately 209.5Ma.
Lithology and environment
Primary lithology: mudstone
Includes fossils?Y
Environment:lacustrine indet.
Geology comments: "playa/lacustrine"
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Disassociated major elements:some
Disassociated minor elements:some
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Ward Terrace
Database number:84017
Authorizer:M. Carrano, R. Butler Enterer:M. Carrano, R. Butler
Modifier:G. Varnham Research group:vertebrate
Created:2008-09-15 14:33:27 Last modified:2022-03-07 05:46:11
Access level:the public Released:2008-09-15 14:33:27
Creative Commons license:CC BY
Reference information

Primary reference:
31651. R. E. Kirby. 1991. A vertebrate fauna from the Upper Triassic Owl Rock Member of the Chinle Formation in Northern Arizona, Northern Arizona University. 1-476 [R. Butler/R. Butler]

Secondary references:

19402ETE R. J. Butler, L. B. Porro, and A. B. Heckert. 2006. A supposed heterodontosaurid tooth from the Rhaetian of Switzerland and a reassessment of the European Late Triassic record of Ornithischia (Dinosauria). Neues Jahrbuch für Geologie und Paläontologie Monatshefte 2006(10):613-633 [M. Carrano/M. Carrano]
79159 D. V. Kent, P. E. Olsen, C. Lepre, C. Rasmussen, R. Mundil, G. E. Gehrels, D. Giesler, R. B. Irmis, J. W. Geissman and W. G. Parker. 2019. Magnetochronology of the Entire Chinle Formation (Norian Age) in a Scientific Drill Core From Petrified Forest National Park (Arizona, USA) and Implications for Regional and Global Correlations in the Late Triassic. Geochemistry, Geophysics, Geosystems [P. Mannion/G. Varnham]
28148ETE R. E. Kirby. 1993. Relationships of Late Triassic basin evolution and faunal replacement in the southwestern United States: perspectives from the upper part of the Chinle Formation in northern Arizona. In S. G. Lucas and M. Morales (eds.), The Nonmarine Triassic. New Mexico Museum of Natural History and Science Bulletin 3:233-242 [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]
31650 P. A. Murry and R. E. Kirby. 2002. A new hybodont shark from the Chinle and Bull Canyon formations, Arizona, Utah and New Mexico. In A. B. Heckert, S. G. Lucas (eds.), Upper Triassic Stratigraphy and Paleontology, New Mexico Museum of Natural History and Science Bulletin 21:87-106 [R. Butler/R. Butler/R. Butler]
31658 J. A. Spielmann, S. G. Lucas, and A. B. Heckert. 2007. Tetrapod fauna of the Upper Triassic (Revueltian) Owl Rock Formation, Chinle Group, Arizona. In S. G. Lucas, J. A. Spielmann (eds.), The Global Triassic, New Mexico Museum of Natural History and Science Bulletin 41:371-383 [R. Butler/R. Butler]