DMNH locality 2560 Gars Galore (Paleocene of the United States)

Where: Colorado (39.5° N, 104.7° W: paleocoordinates 45.7° N, 82.5° W)

• coordinate based on nearby landmark

When: Denver Formation, Puercan (66.0 - 63.3 Ma)

• Denver Formation (D1 sequence); nine meters stratigraphically above the K–Pg boundary and approximately three meters below DMNH loc. 2557

Environment/lithology: fluvial; sandstone

• The deposit ion of sediment s and a s sociated

•microvertebrate materials at DMNH loc. 2560 are represented by two episodes of downcutting fluvial activity, each consisting of a >1 m-thick package of fine- to medium-grained sand and silt.

Size classes: macrofossils, mesofossils, microfossils

• "recovered vertebrate fossils consisted of disarticulated and disassociated hard parts (e.g., teeth, ganoid scales, vertebrae), predominantly ranging between 0.5 mm and 5 mm in size,

•with larger elements and scales up to 1 cm"

Reposited in the DMNH

Primary reference: E.L. Dahlberg, J.J. Eberle, J.J.W. Sertich and I.M. Miller. 2016. A new earliest Paleocene (Puercan) mammalian fauna from Colorado's Denver Basin, U.S.A. Rocky Mountain Geology 51(1):1-22 [P. Holroyd/P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176863: authorized by Patricia Holroyd, entered by Patricia Holroyd on 05.03.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines - Compsemydidae
Compsemys victa Leidy 1856 turtle
Mammalia
 Tribosphenida - Periptychidae
Maiorana sp. Van Valen 1978 condylarth
Ampliconus browni Eberle and Lillegraven 1998 condylarth
 Tribosphenida - Arctocyonidae
Oxyprimus sp. Van Valen 1978 condylarth
Protungulatum donnae Sloan and Van Valen 1965 condylarth
Baioconodon nordicus Jepsen 1930 condylarth
 Marsupialia - Herpetotheriidae
Thylacodon montanensis Williamson et al. 2012 marsupial
 Multituberculata -
Cimexomys minor Sloan and Van Valen 1965 multituberculate
 Multituberculata - Neoplagiaulacidae
Neoplagiaulacidae indet. Ameghino 1890 multituberculate
Mesodma sp. Jepsen 1940 multituberculate
Mesodma hensleighi Lillegraven 1969 multituberculate
Mesodma ambigua Jepsen 1940 multituberculate