NMMNH Loc. L-4005: Late/Upper Maastrichtian, New Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Vertebrata indet. (Lamarck 1801)
Jasinski et al. 2011 1 specimen
NMMNH P-32988
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825
Actinopteri - Amiiformes - Amiidae
Amiidae indet. Huxley 1861
Reptilia - Dinosauria
Dinosauria indet. Owen 1842
Reptilia - Theropoda
Theropoda indet. Marsh 1881
1 specimen
NMMNH P-36545
Reptilia - Dromaeosauridae
Dromaeosauridae informal indet. A Colbert and Russell 1969
Williamson and Brusatte 2014 1 specimen
NMMNH P-32814
Richardoestesia sp. Currie et al. 1990
2 specimens
NMMNH P-32742, 46389
    = cf. Richardoestesia sp. Currie et al. 1990
Williamson and Brusatte 2014
Reptilia - Troodontidae
Troodontidae indet. Gilmore 1924
2 specimens
NMMNH P-33901, 32772
cf. Troodontidae indet. Gilmore 1924
Williamson and Brusatte 2014 2 specimens
NMMNH P-32746
Reptilia - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906
1 specimen
NMMNH P-32567
Reptilia - Nodosauridae
Ankylosauridae indet. Brown 1908
1 specimen
    = Glyptodontopelta mimus Ford 2000
Jasinski et al. 2011
NMMNH P-33917
Reptilia - Ceratopsidae
Ceratopsidae indet. Marsh 1888
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Reptilia - Titanosauridae
Titanosauridae indet. Lydekker 1885
Reptilia - Pterosauria
Pterosauria indet. Kaup 1834
Reptilia - Crocodylia
Crocodylia indet. (Owen 1842)
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Reptilia - Alligatoridae
Alligatoridae indet. Gray 1844
Reptilia - Squamata
Squamata indet. Oppel 1811
Reptilia - Chamopsiidae
Peneteius sp. Estes 1969
3 specimens
NMMNH P-36544, 41223, 41224
Reptilia - Testudines
Testudines indet. Batsch 1788
Mammalia
Mammalia indet. Linnaeus 1758
Mammalia - Multituberculata
Multituberculata indet. Cope 1884
Mammalia - Multituberculata - Cimolomyidae
Essonodon browni Simpson 1927
3 specimens
NMMNH P-32570, 32771, 32773
    = Essonodon sp. Simpson 1927
Jasinski et al. 2011
Mammalia
Theria indet. Parker and Haswell 1897
Mammalia - Glasbiidae
cf. Glasbius sp. Clemens 1966
Williamson and Weil 2008
NMMNH P-46384, 41560
Glasbius cf. intricatus Clemens 1966
Williamson and Weil 2008
NMMNH P-46380, 46381
Mammalia - Alphadontidae
Alphadontidae indet. Marshall et al. 1990
Williamson and Weil 2008
NMMNH P-41549
Mammalia - Pediomyidae
Pediomyidae indet. (Simpson 1927)
Williamson and Weil 2008
NMMNH P-41557, 46395, 54200
Amphibia
Amphibia indet. Linnaeus 1758
Amphibia - Temnospondyli
Caudata indet. Scopoli 1777
Chondrichthyes - Rajiformes - Rhinobatidae
Myledaphus sp. Cope 1876
Jasinski et al. 2011 1 specimen
NMMNH P-44485
see common names

Geography
Country:United States State/province:New Mexico County:San Juan
Coordinates: 36.2° North, 108.9° West (view map)
Paleocoordinates:43.7° North, 86.6° West
Basis of coordinate:based on nearby landmark
Altitude:6749 feet
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Late/Upper Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:Ojo Alamo Member:Naashoibito
Stratigraphic resolution:bed
Stratigraphy comments: Flynn et al. 2020: The mammalian faunas of the Naashoibito Member correlates to the Lancian Land Mammal Age, which suggests a late Maastrichtian age (Williamson and Weil, 2008a). Paleobotanical analyses on the megaflora and pollen indicates that the Ojo Alamo Sandstone is earliest Paleocene in age and is correlated with palynostratigraphic zones P1 or P2 ( Anderson, 1959; Nichols, 2003; Williamson et al., 2008; Flynn and Peppe, in press). Recent detrital sanidine and paleomagnetic work has constrained the Naashoibito Member to the latest Maastrichtian indicating the K/Pg boundary is represented by the unconformity between the Naashoibito Member and the Ojo Alamo Sandstone (Peppe et al., 2013; Flynn et al., 2019). These data, coupled with previous sedimentological analyses, demonstrate that the Naashoibito Member is late Maastrichtian in age and the Ojo Alamo Sandstone is early Paleocene in age with an erosive unconformity, that cuts out the Cretaceous-Paleogene boundary, separating the two units
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:mesofossils
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:occasional
Collection methods and comments
Collection methods:bulk,sieve,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:NMMNH
Metadata
Database number:59068
Authorizer:M. Carrano, C. Boyd Enterer:M. Carrano, C. Boyd
Modifier:G. Varnham Research group:vertebrate
Created:2006-03-08 14:04:01 Last modified:2022-02-08 07:29:16
Access level:the public Released:2006-03-08 14:04:01
Creative Commons license:CC BY
Reference information

Primary reference:
16780.ETE A. Weil, T. E. Williamson, F. Pignataro and J. Colon. 2004. The teiid lizard Peneteius discovered in the Upper Cretaceous Naashoibito Member of the Kirtland Formation, San Juan Basin, New Mexico. Journal of Vertebrate Paleontology 24(3, suppl.):127A [M. Carrano/M. Carrano]

Secondary references:

66250 S. E. Jasinski, R. M. Sullivan, and S. G. Lucas. 2011. Taxonomic composition of the Alamo Wash local fauna from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico. In R. M. Sullivan, S. G. Lucas, & J. A. Spielmann (eds.), Fossil Record 3. New Mexico Museum of Natural History and Science Bulletin 53:216-271 [M. Carrano/M. Carrano/P. Mannion]
42806 T. Williamson and A. Weil. 2008. Metatherian Mammals from the Naashoibito Member, Kirtland Formation, San Juan Basin, New Mexico and Their Biochronologic and Paleobiogeographic Significance. Journal of Vertebrate Paleontology 28:803-815 [T. Williamson/T. Williamson]
50790 T. E. Williamson and S. L. Brusatte. 2014. Small theropod teeth from the Late Cretaceous of the San Juan Basin, northwestern New Mexico and their implications for understanding latest Cretaceous dinosaur evolution. PLoS ONE 9(4):e93190:1-23 [M. Carrano/M. Carrano]