North Prong Quarry (Pleistocene of the United States)

Also known as Symbos convexifrons type site; U.N.S.M. Coll. Loc. Cr-10

Where: Cherry County, Nebraska (42.1° N, 101.2° W: paleocoordinates 42.1° N, 101.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Middle Pleistocene (0.8 - 0.1 Ma)

• No details given. Layer described as "about 80 feet above the water level of the North Branch..."

•said to be "medial Pleistocene, i.e., Illinoian glacial stage" by Jakway 1961

• group of beds-level stratigraphic resolution

Environment/lithology: "channel"; sandstone

• "a channel sand" according to field notes of Charles Osborne

Size class: macrofossils

Collected by Walter Jones and Verne Briggs in 1930 - 1932; reposited in the UNSM

Collection methods: quarrying, mechanical,

• Quarry opened and developed 1930-31 by Jones and Briggs. Field data from 1932 notes of Charles Osborne.

Primary reference: E. H. Barbour. 1934. A new ovibovine, Symbos convexifrons, sp. nov. Bulletin of the Nebraska State Museum 1(37):295-298 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34382: authorized by Matthew Carrano, entered by Matthew Carrano on 28.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia - Cricetidae
Microtus sp. Schrank 1798 vole
 Rodentia - Sciuridae
"Citellus sp." = Spermophilus
"Citellus sp." = Spermophilus Cuvier 1825 ground squirrel
 Rodentia - Geomyidae
Geomys bursarius Shaw 1800 plains pocket gopher
Geomys lutescens Merriam 1890 pocket gopher
 Lagomorpha - Leporidae
Sylvilagus floridanus Allen 1890 eastern cottontail
 Perissodactyla - Equidae
Equus calobatus Troxel 1915 horse
originally entered as "Equus colabatus"
Equus excelsus Leidy 1858 horse
originally entered as "Equus excelsens"
 Carnivora - Canidae
"Aenocyon sp." = Canis
"Aenocyon sp." = Canis Linnaeus 1758 canine
 Carnivora - Felidae
 Xenarthra - Megalonychidae
Megalonyx sp. Harlan 1825 edentate
 Proboscidea - Gomphotheriidae
Stegomastodon aftoniae Osborn 1924 gomphothere
 Proboscidea - Elephantidae
"Parelephas columbi" = Mammuthus columbi, "Archidiskodon imperator" = Mammuthus columbi
"Parelephas columbi" = Mammuthus columbi Falconer 1857 Columbian mammoth
"Archidiskodon imperator" = Mammuthus columbi Falconer 1857 imperial mammoth
 Artiodactyla - Camelidae
Camelops sp. Leidy 1854 camel
 Artiodactyla - Bovidae
"Symbos convexifrons n. sp." = Bootherium bombifrons
"Symbos convexifrons n. sp." = Bootherium bombifrons Harlan 1825 antelope