K-Mark Channel (Cretaceous of the United States)

Also known as KMark II; UCMP V-85092

Where: McCone County, Montana (47.8° N, 106.1° W: paleocoordinates 54.4° N, 79.0° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Hell Creek Formation, Lancian (70.6 - 66.0 Ma)

• said to be Lancian

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Reposited in the UCMP

Primary reference: D. L. Lofgren. 1995. The Bug Creek problem and the Cretaceous-Tertiary transition at McGuire Creek, Montana. University of California Publications in Geological Sciences 140:1-185 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14580: authorized by John Alroy, entered by John Alroy on 12.04.1997, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Acipenseriformes - Acipenseridae
Acipenseridae indet. Bonaparte 1831
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825 gar
 Caudata - Urodela
Lisserpeton sp. Estes 1965 salamander
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines -
Compsemys sp. Leidy 1856 turtle
Compsemys victa Leidy 1856 turtle
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
 Testudines - Pantrionychidae
"Plastomeninae indet." = Plastomenidae
"Plastomeninae indet." = Plastomenidae Hay 1902 turtle
 Theropoda -
 Avetheropoda - Dromaeosauridae
Richardoestesia sp. Currie et al. 1990 coelurosaur
 Hesperornithiformes - Hesperornithidae
Hesperornis sp. Marsh 1872 bird
 Ornithischia -
Ornithischia indet. ornithischian
 Neornithischia -
Ceratopsia indet. ornithischian
 Loricata -
Crocodylia indet. crocodilian
 Crocodylia - Crocodylidae
Crocodylidae indet. Cuvier 1807 crocodile
 Choristodera - Champsosauridae
Champsosauridae indet. Cope 1876 champsosaur
 Choristodera -
Champsosaurus sp. Cope 1876 choristodere
 Mammalia -
 Leptictida - Gypsonictopidae
Gypsonictops illuminatus Lillegraven 1969 eutherian
 Theriiformes -
Theria indet. Parker and Haswell 1897 mammal
 Theriiformes - Peradectidae
"Pediomys florencae" = Aletridelphys florencae
"Pediomys florencae" = Aletridelphys florencae Clemens 1966 metatherian
 Didelphimorphia - Stagodontidae
Didelphodon vorax Marsh 1889 marsupial
 Multituberculata - Cimolomyidae
Meniscoessus robustus Marsh 1889 multituberculate