Biscuit Springs (UCMP V-74122) (Paleocene of the United States)

Also known as Garbani Quarry

Where: Garfield County, Montana (47.6° N, 107.0° W: paleocoordinates 53.9° N, 81.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Tullock Member (Fort Union Formation), Puercan (66.0 - 63.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: fine channel fill; yellow siltstone and sandstone

• "buff to yellowish silts and sands deposited in stacked channels. Dramatic cross-cutting..."

Size class: mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), sieve,

Primary reference: A. Weil. 1998. A new species of Microcosmodon (Mammalia: Multituberculata)from the Paleocene Tullock Formation of Montana, and an argument for the Microcosmodontinae. PaleoBios 18(2/3):1-15 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14666: authorized by John Alroy, entered by John Alroy on 13.10.1998, edited by Patricia Holroyd, Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Amphibia
 Salientia -
Anura indet.5
Anura indet.5 Fischer von Waldheim 1813 frog
 Proteida - Batrachosauroididae
Prodesmodon copei5, Opisthotriton kayi5
Prodesmodon copei5 Estes 1964 salamander
Opisthotriton kayi5 Auffenberg 1961 salamander
 Caudata - Urodela
Lisserpeton bairdi5, Proamphiuma cretacea5
Lisserpeton bairdi5 Estes 1965 salamander
Proamphiuma cretacea5 Estes 1969 salamander
Mammalia
 Theriamorpha - Leptictidae
Prodiacodon crustulum n. sp.6
Prodiacodon crustulum n. sp.6 Novacek 1977 eutherian
 Cimolesta -
Crustulus fontanus n. gen. n. sp.2
Crustulus fontanus n. gen. n. sp.2 Clemens 2017 pantodont
UCMP 136524, holotype
 Cimolesta - Cimolestidae
Cimolestidae indet.3, Betonnia cf. tsosia3
Cimolestidae indet.3 Marsh 1889 eutherian
UCMP 258035, 218982, 258032, 258038, 258031, 258032, 258034, 258036, 258037
Betonnia cf. tsosia3 Williamson et al. 2011 eutherian
UCMP 281371, 218911, 218912, 281341, 218920, 218921
 Theriamorpha - Herpetotheriidae
"Peradectes cf. pusillus" = Thylacodon pusillus1
"Peradectes cf. pusillus" = Thylacodon pusillus1 Matthew and Granger 1921 marsupial
 Theriamorpha - Peradectidae
Peradectes minor n. sp.1
Peradectes minor n. sp.1 Clemens 2006 marsupial
type locality
 Multituberculata - Microcosmodontidae
Microcosmodon harleyi
Microcosmodon harleyi Weil 1998 multituberculate
Reptilia
 Squamata - Anguidae
Glyptosaurinae indet.4
Glyptosaurinae indet.4 Marsh 1872 squamates
 Squamata - Globauridae
Contogenys sloani7
Contogenys sloani7 Estes 1969 squamates
UCMP 130733
1Clemens 2006; 2Clemens 2017; 3Clemens 2019; 4ElShafie 2024; 5Gardner and DeMar 2013; 6Novacek 1977; 7Nydam and Fitzpatrick 2009