Rodents from the Late Hemphillian (Latest Miocene), Sioux County, Nebraska
نویسنده
چکیده
Only one rodent specimen has been previously described from the late Hemphillian ZX Bar local fauna from Sioux County, Nebraska-the holotype of the heteromyid Perognathus coquorum Wood. A re-examination ofthis specimen has led to its allocation to the dipodomyine heteromyid genus Prodipodomys Hibbard. An additional specimen of a fossil rodent has been recognized from the ZX Bar fauna that is referable to a new species of the primitive geomyid Pliogeomys, P. russelli.
منابع مشابه
Environmental Change in the Great Plains: An Isotopic Record from Fossil Horses
Carbon and oxygen isotope ratios of fossil horse tooth enamel from Nebraska and Texas show evidence for late Neogene environmental changes in the Great Plains. The earliest unambiguous C4 dietary signal among Texas equids coincides with the age of the classic late Hemphillian–age Coffee Ranch fauna, which we suggest is ∼6.6 Ma based on volcanic ash correlations. C4 vegetation was present in the...
متن کاملPace versus Trot: Can Medium Speed Gait Be Determined from Fossil Trackways?
Five camelid trackways from Arizona and New Mexico are described. Two trackways from the Bear Springs Badland (early Blancan) of Graham County, Arizona, represent a large camel, possibly Camelops or Megatylopus, and a medium-sized camel, possibly Hemiauchenia or Pleiolama. We also describe three camelid trackways from New Mexico. A medial Miocene (late Barstsovian) trackway from the Benavidez R...
متن کاملCylindrodonts (Cylindrodontidae, Rodentia) and a New Genus of Eomyid, Paranamatomys, (Eomyidae, Rodentia) from the Chadronian of Sioux County, Nebraska
Cylindrodon galbreathi Ostrander is shown to be ajunior synonym of C. nebraskensis Hough and AIf, and the first specimen of Ardynomys occidentalis is reported from the Chadronian of Nebraska. A restudy of the holotype of Cupressimus storeri Ostrander has revealed that this species is not referable to Cupressimus Storer but is referred to a new genus, Paranamatomys, which is referred to a new tr...
متن کاملA New Genus of Prairie Dog (Sciuridae, Rodentia) From the Miocene (Barstovian of Montana and Clarendonian of Nebraska) and the Classification of Nearctic Ground Squirrels (Marmotini)
A new genus of sciurid, Cynomyoides, is named. The new genus includes a new species from the late Clarendonian of Nebraska, C. vatis (type species), and an unnamed species from the early Barstovian of Montana. The dental and mandibular morphology of Cynomyoides is reminiscent of that of the latest Tertiary to Recent prairie dog Cynomys and is believed to be part of the lineage leading to Cynomy...
متن کاملEcomorphological characterization of murines and non-arvicoline cricetids (Rodentia) from south-western Europe since the latest Middle Miocene to the Mio-Pliocene boundary (MN 7/8–MN13)
Rodents are the most speciose group of mammals and display a great ecological diversity. Despite the greater amount of ecomorphological information compiled for extant rodent species, studies usually lack of morphological data on dentition, which has led to difficulty in directly utilizing existing ecomorphological data of extant rodents for paleoecological reconstruction because teeth are the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017