Chronister Site: Late/Upper Santonian - Middle Campanian, Missouri
collected by D. Stewart, M. Mehl, B. Stinchcomb 1940-1942, 1972, 1987–1988

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Stinchcomb et al. 1994 11 specimens
cf. Hadrosauridae indet. Cope 1869
Stinchcomb et al. 1994 5 specimens
Neosaurus missouriensis n. gen., n. sp. Gilmore and Stewart 1945
Gilmore and Stewart 1945 1 individual
nomen dubium belonging to Hadrosauridae
USNM 16375
Reptilia - Tyrannosauridae
Albertosaurus sp. Osborn 1905
Stinchcomb 2006
Reptilia
cf. Leidyosuchus sp. Lambe 1907
Stinchcomb et al. 1994 4 specimens
R coracoid, scutes
Reptilia - Crocodilidae
Crocodilidae indet. (Cuvier 1807)
Stinchcomb et al. 1994 1 specimen
spelled with current rank as Crocodylidae
phalanx
Reptilia - Testudines
Testudines indet. Batsch 1788
Darrough et al. 2005 2 specimens
Reptilia - Testudines - Trionychidae
Stinchcomb et al. 1994
Reptilia - Testudines - Adocidae
cf. Adocus sp. Cope 1868
Stinchcomb et al. 1994 2 specimens
    = Adocus punctatus Marsh 1890
Darrough et al. 1996
synonym of Adocus beatus
Reptilia
Naomichelys sp. Hay 1908
Stinchcomb et al. 1994 2 specimens
Actinopteri - Amiiformes - Amiidae
Amiidae indet. Huxley 1861
Darrough et al. 2005
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825
Stinchcomb et al. 1994
Chondrichthyes - Batoidea
Batoidea indet.
Stinchcomb et al. 1994
Chondrichthyes - Hybodontiformes - Hybodontidae
Hybodontidae indet. (Agassiz 1834)
Darrough et al. 2005
see common names

Geography
Country:United States State/province:Missouri County:Bollinger
Coordinates: 37.3° North, 90.0° West (view map)
Paleocoordinates:40.2° North, 59.7° West
Basis of coordinate:based on nearby landmark
Altitude:540 feet
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Key time interval:Late/Upper Santonian - Middle Campanian
Age range of interval:86.30000 - 72.10000 m.y. ago
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: Has previously been assigned to the McNairy Sand, within the Ripley Formation, but this is uncertain, and most authors consider the bed to be an unnamed smectite clay unit overlapping in age with the Coffee Sand, Mooreville Chalk, and Blufftown formations, and local in extent.
Lithology and environment
Primary lithology:black,blue poorly lithified claystone
Includes fossils?Y
Lithology description: "clay, blue to black, very plastic"
Environment:karst indet.
Geology comments: clays in a filled sink into Ordovician rocks
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:medium
Associated major elements:all
Fragmentation:none
Temporal resolution:snapshot
Collection methods and comments
Collection methods:bulk,selective quarrying,surface (in situ),mechanical,sieve,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:D. Stewart, M. Mehl, B. Stinchcomb Collection dates:1940-1942, 1972, 1987–1988
Metadata
Database number:45679
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2004-11-23 10:34:24 Last modified:2022-09-27 15:20:13
Access level:the public Released:2004-11-23 10:34:24
Creative Commons license:CC BY
Reference information

Primary reference:
17004.ETE E. B. Branson. 1942. Dinosaur from the Cretaceous of Missouri. Bulletin of the Geological Society of America 53:1841 [M. Carrano/M. Carrano]

Secondary references:

82723 A. Darrough, J. G. Armstrong-Hall, and M. Fix. 2000. Reptiles at the Cretaceous Chronister site in Missouri. Journal of Vertebrate Paleontology 20(3 (suppl.)):37A [M. Carrano/M. Carrano]
14827ETE G. Darrough, M. Fix, D. Parris and B. Grandstaff. 2005. Chronister dinosaur site investigations: new information on the Cretaceous of Missouri. Journal of Vertebrate Paleontology 25(3):49A [M. Carrano/M. Carrano]
85692 G. Darrough, D. C. Parris, and B. Grandstaff. 1996. Adocus in the Cretaceous fauna of Bollinger County, Missouri. Journal of Vertebrate Paleontology 16(3, suppl.):30A [M. Carrano/M. Carrano]
12055ETE C. W. Gilmore. 1945. Parrosaurus, n. name, replacing Neosaurus Gilmore, 1945. Journal of Paleontology 19:540 [M. Carrano/M. Carrano/M. Carrano]
12054ETE C. W. Gilmore and D. R. Stewart. 1945. A new sauropod dinosaur from the Upper Cretaceous of Missouri. Journal of Paleontology 19(1):23-29 [M. Carrano/M. Carrano/M. Carrano]
29954ETE B. L. Stinchcomb. 2006. Chronister vertebrate site. In D. Hoffman, B. L. Stinchcomb, and J. R. Palmer (eds.), Association of Missouri Geologists, 53rd Annual Meeting and Field Trips, Sikeston. Association of Missouri Geologists 5-8 [M. Carrano/M. Carrano]
79086 B. L. Stinchcomb, D. C. Parris, B. S. Grandstaff and R. K. Denton. 1994. The Chronister site (Cretaceous of Missouri) and its vertebrate fauna. MAPS Digest 17(4):46-63 [M. Carrano/M. Carrano]