NMMNH L-2739, Sixmile Spring: Norian, New Mexico
collected by A. B. Heckert & S. G. Lucas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Xenacanthiformes
- Xenacanthidae
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"Xenacanthus" sp.
Beyrich 1848
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34443, broken labial cusp | ||||||||||
Chondrichthyes
- Hybodontiformes
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Hybodontoidea indet.
Agassiz 1834
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Heckert 2004 | |||||||||
Osteichthyes
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Osteichthyes indet.
Huxley 1880
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34431, vertebra | ||||||||||
Coelacanthimorpha
- Coelacanthiformes
- Coelacanthidae
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Coelacanthidae indet.
Agassiz 1843
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Heckert 2004 | 2 specimens | ||||||||
NMMNH P-34424, 34425, scales | ||||||||||
Amphibia
- Temnospondyli
- Metoposauridae
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Metoposauridae indet.
Watson 1919
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34442, tooth | ||||||||||
Buettneria sp.
Case 1922
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synonym of Anaschisma | ||||||||||
Apachesaurus sp.
Hunt 1993
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34441, centrum | ||||||||||
Reptilia
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Reptilia indet.
Laurenti 1768
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Heckert 2004 | 8 specimens | ||||||||
NMMNH P-34433-34436, 34438, 34439, centra. NMMNH P-34460, 34461, teeth | ||||||||||
Trilophosaurus aff. jacobsi
Murry 1987
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Heckert 2004 | 3 specimens | ||||||||
NMMNH P-34447, 34448, 34472, teeth | ||||||||||
= Trilophosaurus jacobsi
Murry 1987
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Heckert et al. 2006 | |||||||||
Theropoda indet.
Marsh 1881
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Heckert 1997 | 1 specimen | ||||||||
"more advanced than the Herrerasauridae"; NMMNH P-18401, ten vertebral fragments | ||||||||||
= Archosauriformes indet.
Gauthier 1986
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Nesbitt et al. 2007 | |||||||||
Archosauriformes informal indet. B
Gauthier 1986
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34451, tooth, "morphotype B" | ||||||||||
Archosauriformes informal indet. F
Gauthier 1986
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34452, tooth, "morphotype F" | ||||||||||
Archosauriformes informal indet. M
Gauthier 1986
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34453, tooth, "morphotype M" | ||||||||||
Archosauriformes informal indet. S
Gauthier 1986
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-34473, tooth, "morphotype S" | ||||||||||
? Theropoda indet.
Marsh 1881
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Heckert 1997 | 1 specimen | ||||||||
NMMNH P-18400, partial skeleton | ||||||||||
= Archosauriformes indet.
Gauthier 1986
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Nesbitt et al. 2007 | |||||||||
Reptilia
- Stagonolepididae
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Stagonolepididae indet.
Lydekker 1887
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Reptilia
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Parasuchia indet.
(Huxley)
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Heckert 1997 | 10 specimens | ||||||||
synonym of Phytosauria | ||||||||||
NMMNH P-18270, occipital condyle. NMMNH P-18271-18275, vertebral fragments. NMMNH P-34454-34457, teeth | ||||||||||
? Parasuchia indet.
Huxley
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Heckert 1997 | 1 specimen | ||||||||
synonym of Phytosauria | ||||||||||
NMMNH P-18275, four centrum fragments | ||||||||||
Reptilia
- Ornithischia
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? Ornithischia indet.
Seeley 1888
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Heckert 2004 | 3 specimens | ||||||||
NMMNH P-34458, 34459; NMMNH P-34500 (only first two are "?"), teeth | ||||||||||
Reptilia
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? Prosauropoda indet.
Huene 1920
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Heckert 2004 | 1 specimen | ||||||||
NMMNH P-18405, tooth fragment | ||||||||||
aff. Tecovasaurus sp.
Hunt and Lucas 1994
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Heckert 1997 | 1 specimen | ||||||||
NMMNH P-18402, tooth | ||||||||||
= Crosbysaurus harrisae
Heckert 2004
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Heckert 2004 | |||||||||
Ornithischia indet.
Seeley 1888
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Heckert 1997 | 2 specimens | ||||||||
NMMNH P-18403, 18404, teeth | ||||||||||
= Crosbysaurus harrisae
Heckert 2004
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Heckert 2004 | |||||||||
Actinopterygii
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Actinopterygii indet.
Cope 1887
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Heckert 2004 | 2 specimens | ||||||||
NMMNH P-34444, 34445, teeth | ||||||||||
Palaeonisciformes
- Redfieldiidae
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Redfieldiidae indet.
Hutchinson 1973
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Heckert 2004 | |||||||||
Palaeonisciformes
- Palaeoniscidae
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aff. Turseodus sp.
Leidy 1857
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Heckert 2004 | |||||||||
see common names |
Geography
Country: | United States | State/province: | New Mexico | County: | McKinley |
Coordinates: | 35.4° North, 108.5° West (view map) | ||||
Paleocoordinates: | 10.9° North, 47.1° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Altitude: | 2234 meters | ||||
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: | 228.00000 - 208.50000 m.y. ago |
Stratigraphy
Geological group: | Chinle | Formation: | Bluewater Creek | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Adamanian LVF; radiometric dates suggest that the Chinle is entirely Norian in age. Also known as the Bluewater Creek Member of the Chinle Formation. Near base of formation. |
Lithology and environment
Primary lithology: | paleosol/pedogenic,sideritic,gray,red,blue mudstone |
Includes fossils? | Y |
Lithology description: "a grayish-blue to grayish red-purple, highly smectitic mudstone...almost no evidence for coarse-grained clastic material...abundant siderite (calcrete) nodules and some color mottling" | |
Environment: | pond |
Geology comments: either "a pond or other limnitic environment" with "post-depositional pedogenesis" or "a distal floodplain environment." |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Associated major elements: | some |
Disassociated major elements: | some |
Disassociated minor elements: | some |
Fragmentation: | frequent |
Collection methods and comments
Collection methods: | bulk,selective quarrying,surface (in situ),mechanical,sieve,field collection |
Reason for describing collection: | general faunal/floral analysis |
Museum repositories: | NMMNH |
Collectors: | A. B. Heckert & S. G. Lucas |
Metadata
Also known as: | Fort Wingate | ||
Database number: | 55248 | ||
Authorizer: | M. Carrano, R. Butler | Enterer: | M. Carrano, R. Butler |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2005-10-03 10:31:14 | Last modified: | 2018-04-23 17:06:28 |
Access level: | the public | Released: | 2005-10-03 10:31:14 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
14718. | ETE | A. B. Heckert, S. G. Lucas, and A. P. Hunt. 1994. A late Carnian theropod from New Mexico: implications for the early evolution of Theropoda. Journal of Vertebrate Paleontology 14(3, suppl.):28A [M. Carrano/M. Carrano] |
Secondary references:
25561 | ETE | A. B. Heckert. 1997. The tetrapod fauna of the Upper Triassic lower Chinle Group (Adamanian: latest Carnian) of the Zuni Mountains, west-central New Mexico. In S. G. Lucas, J. W. Estep, T. E. Williamson, & G. S. Morgan (eds.), New Mexico's Fossil Record 1. New Mexico Museum of Natural History and Science Bulletin 11:29-39 [M. Carrano/M. Carrano] |
17273 | ETE | A. B. Heckert. 2004. Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian: Carnian), southwestern U.S.A. New Mexico Museum of Natural History and Science Bulletin 27:1-170 [M. Carrano/M. Carrano] |
25555 | ETE | A. B. Heckert and S. G. Lucas. 1998. First use of ornithischian dinosaurs for biostratigraphic zonation of the Upper Triassic. Albertiana 20:58-63 [M. Carrano/M. Carrano] |
32141 | A. B. Heckert, S. G. Lucas, L. F. Rinehart, J. A. Spielmann, A. P. Hunt and R. Kahle. 2006. Revision of the archosauromorph reptile Trilophosaurus, with a description of the first skull of Trilophosaurus jacobsi, from the Upper Triassic Chinle Group, West Texas, USA. Palaeontology 49(3):621-640 [R. Butler/R. Butler] | |
24941 | ETE | 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] |
24249 | ETE | 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] |