OMNH V239, Mussentuchit: Early/Lower Cenomanian, Utah

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Spalacotheriidae
Spalacolestes cretulablatta Cifelli and Madsen 1999
Cifelli 1999 2 specimens
Spalacotheridium noblei Cifelli and Madsen 1999
Cifelli 1999 3 specimens
Mammalia
Sinbadelphys schmidti Cifelli 2004
Cifelli 2004
Dakotadens pertritus Cifelli et al. 2016
Cifelli et al. 2016 3 specimens
OMNH 25813, 25798, 25803
Adelodelphys muizoni Cifelli 2004
Cifelli 2004
Culicolestes kielanae n. gen., n. sp. Cifelli et al. 2016
Cifelli et al. 2016 1 specimen
OMNH 25809
? Culicolestes kielanae Cifelli et al. 2016
Cifelli et al. 2016 1 specimen
OMNH 25802
Mammalia - Multituberculata
Bryceomys intermedius Eaton and Cifelli 2001
Eaton and Cifelli 2001 2 specimens
including tentatively referred M1
Cedaromys bestia (Eaton and Nelson 1991)
Eaton and Cifelli 2001 2 specimens
Cedaromys parvus n. sp. Eaton and Cifelli 2001
Eaton and Cifelli 2001 17 specimens
holotype M1, OMNH 25747; including two tentatively referred m1s
cf. Paracimexomys cf. robisoni Eaton and Nelson 1991
Eaton and Cifelli 2001 1 specimen
cf. Paracimexomys perplexus Eaton and Cifelli 2001
Eaton and Cifelli 2001 5 specimens
Mammalia - Eutriconodonta - Triconodontidae
Jugulator amplissimus Cifelli and Madsen 1998
4 specimens
Astroconodon delicatus n. sp. Cifelli and Madsen 1998
2 specimens
Corviconodon utahensis Cifelli and Madsen 1998
5 specimens
Reptilia
Dimekodontosaurus madseni Nydam 2002
Nydam 2002
Reptilia - Polyglyphanodontidae
? Polyglyphanodontinae indet. (Gilmore 1942)
Cifelli et al. 1999 1 specimen
original and current combination Polyglyphanodontidae
OMNH 32639
? Polyglyphanodontinae indet. (Gilmore 1942)
Cifelli et al. 1999 1 specimen
OMNH 29771
    = Dicothodon moorensis n. gen., n. sp. Nydam 1999
Nydam 1999
Bicuspidon numerosus Nydam and Cifelli 2002
Nydam and Cifelli 2002
Reptilia - Elongatoolithidae
Macroelongatoolithus carlylei (Jensen 1970)
Zelenitsky et al. 2000 1500 specimens
TMP 98.107.4, 98.107.15, 98.107.18, 98.107.22
Amphibia - Temnospondyli - Albanerpetontidae
Albanerpetontidae indet. Fox and Naylor 1982
Gardner 1999 1 specimen
OMNH 26210
Albanerpeton cf. nexuosus Estes 1981
Gardner 1999 1 specimen
OMNH 26222
see common names

Geography
Country:United States State/province:Utah County:Emery
Coordinates: 39.0° North, 111.9° West (view map)
Paleocoordinates:40.4° North, 74.0° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Cenomanian 10 m.y. bin:Cretaceous 5
Key time interval:Early/Lower Cenomanian
Age range of interval:100.50000 - 93.90000 m.y. ago
Stratigraphy
Geological group:Dakota Formation:Cedar Mountain Member:Mussentuchit
Stratigraphic resolution:group of beds
Stratigraphy comments: 4 m below overlying Naturita Fm.

A radiometric age of 98.37 ± 0.07 Ma was obtained by the OMNH from volcanic ash within the Mussentuchit Member (Cifelli and others, 1997, 1999). Additional ages by Garrison and others (2007) ranging from 96.7 ± 0.5 to 98.2 ±0.6 Ma indicate that the Mussentuchit Member was deposited over an interval of 1.5 Ma during the early Cenomanian and supports a correlation with the siliceous marine Mowry Shale to the north, which is well-constrained from 40Ar/39Ar sanidine ages obtained from bentonite beds that bracket the Mowry in Wyoming; the basal Arrow Creek Bentonite is 98.5 ± 0.5 Ma and the capping Clay Spur Bentonite is 97.2 ± 0.7 Ma (Obradovich, 1993; Ogg and Hinnov, 2012; Sprinkel and others, 2012) near the base of the Upper Cretaceous. Tucker et al. 2020 also suggested a likely depositional age of ~96-94Ma for the Musseuntuchit member.
Lithology and environment
Primary lithology: not reported
Environment:"channel"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:taxonomic analysis
Metadata
Database number:14399
Authorizer:J. Alroy, R. Benson, M. Carrano Enterer:J. Alroy, M. Carrano, R. Benson
Modifier:M. Carrano Research group:vertebrate
Created:1998-09-21 00:00:00 Last modified:2023-08-21 15:31:32
Access level:the public Released:1998-09-21 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1223. R. L. Cifelli and S. K. Madsen. 1998. Triconodont mammals from the medial Cretaceous of Utah. Journal of Vertebrate Paleontology 18(2):403-411 [J. Alroy/J. Alroy/M. Carrano]

Secondary references:

1213 R. L. Cifelli. 1999. Therian teeth of unusual design from the mid-Cretaceous (Albian–Cenomanian) Cedar Mountain Formation of Utah. Journal of Mammalian Evolution 6(3):247-270 [J. Alroy/J. Alroy/M. Carrano]
39671 R. L. Cifelli. 2004. Chapter 5: Marsupial Mammals from the Albian–Cenomanian (Early–Late Cretaceous) Boundary, Utah. Bulletin of the American Museum of Natural History 285:62-79 [R. Benson/R. Benson]
60386 R. L. Cifelli, J. E. Cohen, and B. M. Davis. 2016. New tribosphenic mammals from the Mussentuchit Local Fauna (Cedar Mountain Formation, Cenomanian), Utah, USA. Palaeontologia Polonica 67:67-81 [M. Carrano/M. Carrano]
1227 R. L. Cifelli, R. L. Nydam, J. D. Gardner, A. Weil, J. G. Eaton, J. I. Kirkland, and S. K. Madsen. 1999. Medial Cretaceous vertebrates from the Cedar Mountain Formation, Emery County, Utah: the Mussentuchit local fauna. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah. Utah Geological Survey Miscellaneous Publication 99-1:219-242 [J. Alroy/J. Alroy/M. Carrano]
6099 J. G. Eaton and R. L. Cifelli. 2001. Multituberculate mammals from near the Early-Late Cretaceous boundary, Cedar Mountain Formation, Utah. Acta Palaeontologica Polonica 46(4):453-518 [J. Alroy/J. Alroy/M. Carrano]
70607 J. A. Frederickson, M. H. Engel, and R. L. Cifelli. 2018. Niche partitioning in theropod dinosaurs: diet and habitat preference in predators from the uppermost Cedar Mountain Formation (Utah, U.S.A.). Scientific Reports 8(1):17872:1-13 [M. Carrano/M. Carrano]
6845 J. D. Gardner. 1999. New albanerpetontid amphibians from the Albian to Coniacian of Utah, USA—bridging the gap. Journal of Vertebrate Paleontology 19(4):632-638 [J. Alroy/J. Alroy/M. Carrano]
25684 R. L. Nydam. 1999. Polyglyphanodontinae (Squamata: Teiidae) from the medial and Late Cretaceous: new taxa from Utah, U.S.A. and Baja California del Norte, Mexico. Utah Geological Survey Miscellaneous Publication 99-1:303-317 [J. Alroy/J. Alroy]
7277 R. L. Nydam. 2002. Lizards of the Mussentuchit Local Fauna (Albian-Cenomanian boundary) and comments on the evolution of the Cretaceous lizard fauna of North America. Journal of Vertebrate Paleontology 22(3):645-660 [J. Alroy/J. Alroy/J. Alroy]
6714 R. L. Nydam and R. L. Cifelli. 2002. A new teiid lizard from the Cedar Mountain Formation (Albian-Cenomanian boundary) of Utah. Journal of Vertebrate Paleontology 22(2):276-285 [J. Alroy/J. Alroy/J. Alroy]
70245 D. K. Zelenitsky, K. Carpenter, and P. J. Currie. 2000. First record of elongatoolithid theropod eggshell from North America: the Asian oogenus Macroelongatoolithus from the lower Cretaceous of Utah. Journal of Vertebrate Paleontology 20(1):130-138 [M. Carrano/M. Carrano]