Blue Lake (Paleocene of the United States)

Where: Sanpete County, Utah (39.1° N, 111.8° W: paleocoordinates 46.6° N, 90.4° W)

• coordinate based on political unit

When: North Horn Formation, Puercan (66.0 - 63.3 Ma)

Environment/lithology: terrestrial

Primary reference: S. F. Robison. 1986. Paleocene (Puercan-Torrejonian) mammalian faunas of the North Horn Formation, central Utah. Brigham Young University Geology Studies 33(1):87-133 [J. Alroy/J. Alroy]more details

PaleoDB collection 14670: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• about 180 m below upper contact of Fm.
Mammalia
 Theriamorpha - Periptychidae
Periptychus coarctatus Cope 1883 condylarth
includes "P. hamaxitus"
Ectoconus symbolus Gazin 1941 condylarth
Oxyacodon sp. Osborn and Earle 1895 condylarth
said to be new
Oxyacodon ferronensis n. sp. Archibald et al. 1983 condylarth
Oxyacodon apiculatus Osborn and Earle 1895 condylarth
 Procreodi - Arctocyonidae
Oxyclaenus pugnax Simpson 1935 condylarth
Loxolophus pentacus Cope 1888 condylarth
 Condylarthra -
Desmatoclaenus hermaeus1 Gazin 1941 placental
 Condylarthra - Hyopsodontidae
Promioclaenus sp. Trouessart 1904 condylarth
Reptilia
 Testudinata -
Compsemys victa Leidy 1856 turtle
 Testudines - Trionychidae
Trionychidae indet.2 Gray 1825 softshell turtle
 Squamata - Anguidae
"cf. Proxestops jepseni" = Proxestops silberlingii
"cf. Proxestops jepseni" = Proxestops silberlingii Gilmore 1938 squamates
 Loricata -
Crocodylia indet.3 crocodilian
 Crocodylia - Alligatoridae
cf. Allognathosuchus sp. Mook 1921 crocodilian
Actinopteri
 Lepisosteiformes - Lepisosteidae
cf. Lepisosteus sp. Agassiz 1843 gar