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
 Cimolesta - Cimolestidae
Procerberus formicarum Sloan and Van Valen 1965 eutherian
 Primates -
Purgatorius ceratops2 Van Valen and Sloan 1965 primate
 Tribosphenida - Periptychidae
Mimatuta morgoth n. sp.4 Van Valen 1978 condylarth
 Tribosphenida - Arctocyonidae
Oxyprimus erikseni 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 cf. donnae Sloan and Van Valen 1965 condylarth
Protungulatum gorgun n. sp.4 Van Valen 1978 condylarth
"Ragnarok harbichti n. sp." = Baioconodon nordicus1 Jepsen 1930 condylarth
 Theriiformes - Marsupialia
Marsupialia indet.1 marsupial
presumably includes "Peradectes" of Sloan and Van Valen 1965
 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