Harbicht Hill (Paleocene of the United States)

Also known as UCMP V-71203

Where: McCone County, Montana (47.8° N, 106.2° W: paleocoordinates 54.0° N, 80.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hell Creek Formation, Puercan (66.0 - 63.3 Ma)

• 40 feet below the Tullock Formation. The stratigraphic level is said to be 'about the same as Bug Creek Anthills'

Environment/lithology: "floodplain"; lithology not reported

• environment given as "floodplain-riparian" at the level of the formation

Size class: mesofossils

Reposited in the UCMP

Primary reference: R. E. Sloan and L. Van Valen. 1965. Cretaceous mammals from Montana. Science 148(3667):220-227 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14741: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• based on Lofgren et al. 1990 and Lofgren 1995, fauna is mixed; I have sorted out Paleocene and reworked Cretaceous lists based on Lofgren's scheme
"Purgatorius ceratops" type: only a single tooth; Johnston and Fox 1984, Fox 1990, and Buckley 1997 all question this record on the grounds that it is probably a contaminant in the screenwash sample; Van Valen 1994 disagrees
Mammalia
 Multituberculata - Eucosmodontidae
Eucosmodontidae indet.1 Jepsen 1940 multituberculate
said to be a new genus
"Cimexomys gratus" = Stygimys gratus3 Jepsen 1930 multituberculate
Stygimys kuszmauli3 Sloan and Van Valen 1965 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma sp.1 Jepsen 1940 multituberculate
 Multituberculata - Taeniolabididae
Catopsalis alexanderi3 Middleton 1982 multituberculate
 Theriamorpha - Marsupialia
Marsupialia indet.1 marsupial
presumably includes "Peradectes" of Sloan and Van Valen 1965
 Cimolesta - Cimolestidae
Procerberus formicarum Sloan and Van Valen 1965 eutherian
 Procreodi - Arctocyonidae
"Ragnarok harbichti n. sp." = Baioconodon nordicus1 Jepsen 1930 condylarth
Mimatuta morgoth n. sp.4 Van Valen 1978 condylarth
Protungulatum sp.1 Sloan and Van Valen 1965 condylarth
several forms, including "M" (="S" of Sloan/Van Valen?), "H," and "E"
Protungulatum gorgun n. sp.4 Van Valen 1978 condylarth
Protungulatum cf. donnae Sloan and Van Valen 1965 condylarth
Oxyprimus erikseni n. sp.4 Van Valen 1978 condylarth
 Primates - Purgatoriidae
Purgatorius ceratops n. sp.2 Van Valen and Sloan 1965 primate