Calamagras weigeli was widespread temporally and geographically, previously being reported from the Chadronian NALMA (Late Eocene) of Canada, Arikareean NALMA (Early Miocene) of Wyoming, Hemingfordian NALMA (Early Miocene) of South Dakota, and Barstovian NALMA (Middle Miocene) of Texas (3).
Geringophis depressus was known previously from the Early Arikareean NALMA (Late Oligocene) of Nebraska and Wyoming, and the Late Arikareean to Late Barstovian NALMA (Early to Middle Miocene, respectively) of Nebraska (Holman, 3).
Lower vertebrates from an Arikareean (earliest Miocene) fauna near the Toledo Bend Dam, Newton County, Texas.
Insectivores, rodents, and carnivores of the Toledo Bend Local Fauna: an Arikareean (earliest Miocene) assemblage from the Texas Coastal Plain.
Faunal succession and biochronology of the Arikareean through Hemphillian interval (late Oligocene through earliest Pliocene Epochs) in North America.
Mammalian biochronology of the Arikareean through Hemphillian interval (Late Oligocene through Early Pliocene Epochs).
Hemphillian (Late Miocene) snakes from Nebraska, with comments on Arikareean
through Blancan snakes of Midcontinental North America.
13, Bailey (3), and Schumaker (2), the Turtle Butte Assemblage was determined to be late early Arikareean in age.
Identification of the Turtle Butte Assemblage specimens as Nothocyon represents both age and geographic range extensions for the genus from the early late Arikareean to the late early Arikareean.
Albright LB: Lower vertebrates from an Arikareean
(earliest Miocene) fauna near the Toledo Bend Dam, Newton County, Texas.
Bailey (2), interpreted the fossils from the Turtle Butte Formation as late early Arikareean
, although this age interpretation is based only on 17 specimens.
North American early Arikareean
faunal assemblages are rare, thus any additional evidence of late Oligocene paleoenvironment is important.