South side of Missouri River floodplain, near Obert (Cretaceous of the United States)

Where: Cedar County, Nebraska (42.7° N, 97.0° W: paleocoordinates 42.8° N, 60.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Blue Hill Member (Carlile Shale Formation), Middle Turonian (93.5 - 89.3 Ma)

• Located at least 25 m below the contact between the Blue Hill Shale Member and Fort Hays Member (i.e., within the bottom half of the Blue Hill Shale). An ammonite Collignoniceras percarinatum (Hall and Meek, 1856) is reported from “the middle part of the Carlile Shale” in Dixon County (Kennedy et al., 2001, fig. 48), that dates the Blue Hill Shale (Fig. 1A) to the Middle Turonian.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, nodular, phosphatic shale

• The fossils were originally enclosed in a phosphate pebble conglomerate weathered to the surface from the shaly sediments.

Size class: macrofossils

Collected by J.I. Kirkland; reposited in the UNSM

Collection methods: surface (in situ)

Primary reference: O. Ouroumova, K. Shimada, and J. I. Kirkland. 2016. Fossil marine vertebrates from the Blue Hill Shale Member (Middle Turonian) of the Upper Cretaceous Carlile Shale in northeastern Nebraska. Transactions of the Kansas Academy of Science 119:211-221 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 213389: authorized by Matthew Clapham, entered by Matthew Clapham on 30.08.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Amiiformes - Caturidae
Caturidae indet. Owen 1860 bowfin
 Aspidorhynchiformes - Aspidorhynchidae
 Pachycormiformes - Pachycormidae
 Albuliformes - Albulidae
Albulidae indet. Bleeker 1859 bonefish
 Crossognathiformes - Pachyrhizodontidae
Pachyrhizodus minimus Stewart 1899
 Aulopiformes - Enchodontidae
Enchodus shumardi Leidy 1856
Enchodus gladiolus Cope 1872
 Tselfatiiformes - Plethodidae
Plethodidae indet. Loomis 1900
 Pycnodontiformes - Mesturidae
cf. Micropycnodon sp. Hibbard and Graffham 1945
 Pycnodontiformes - Pycnodontidae
Pycnodontidae indet. Agassiz 1833
cf. Palaeobalistum sp. Blainville 1818
cf. Anomoeodus sp. Forir 1887
cf. Hadrodus sp. Leidy 1857
Reptilia
 Squamata - Dolichosauridae
cf. Coniasaurus sp. Owen 1850 squamates
Chondrichthyes
 Lamniformes - Aquilolamnidae
Cretomanta canadensis Case et al. 1990 mackerel shark
 Lamniformes - Odontaspididae
? Eostriatolamia sp. Glikman 1980 sand tiger shark
Eostriatolamia paucicorrugata Underwood and Cumbaa 2010 sand tiger shark
 Lamniformes - Mitsukurinidae
"Scapanorhynchus raphiodon" = Scapanorhynchus rhaphiodon
"Scapanorhynchus raphiodon" = Scapanorhynchus rhaphiodon Agassiz 1843 goblin shark
 Lamniformes - Anacoracidae
Squalicorax sp. Whitley 1939 crow shark
Squalicorax cf. falcatus Agassiz 1843 crow shark
Squalicorax cf. pawpawensis Siverson et al. 2007 crow shark
 Lamniformes - Pseudoscapanorhynchidae
Cretodus crassidens Dixon 1850 mackerel shark
 Lamniformes - Otodontidae
Cretalamna appendiculata Agassiz 1835 mackerel shark
 Orectolobiformes - Hemiscylliidae
Chiloscyllium greeni Cappetta 1973 carpet shark
 Orectolobiformes - Ginglymostomatidae
Cantioscyllium decipiens Woodward 1889 nurse shark
 Carcharhiniformes - Scyliorhinidae
Scyliorhinidae indet. Gill 1862 cat shark
 Rajiformes - Ptychotrygonidae
"Ptychotrygon hooveri" = Texatrygon hooveri McNulty and Slaughter 1972 ray
 Rajiformes - Sclerorhynchidae
Ischyrhiza texana Cappetta and Case 1975 ray
Ischyrhiza mira Leidy 1856 ray
 Rajiformes - Rhinobatidae
Rhinobatos incertus Cappetta 1973 guitarfish
 Rajiformes -
Protoplatyrhina renae Case 1978 guitarfish
Pseudohypolophus mcnultyi Thurmond 1971 guitarfish
 Hybodontiformes - Ptychodontidae
Ptychodus anonymus Williston 1900 elasmobranch
Ptychodus whipplei Marcou 1858 elasmobranch
 Hybodontiformes -
Lissodus sp. Brough 1935 elasmobranch
 Hybodontiformes - Hybodontidae
Meristodonoides sp. Underwood and Cumbaa 2010 elasmobranch