A didelphid (Marsupialia) from the early Eocene of Colorado

It is known that opossums (Marsupialia, Didelphidae) were present and abundant locally, at least, in North America from late Cretaceous to early Miocene, reappearing in the Pleistocene and then continuing to the present time…

Puerco fauna, Lower Paleocene

11 p. : ill. ; 24 cm.Includes bibliographical references

Technique for the study of fossils

6 p. : ill. ; 24 cm.Includes bibliographical references

Age of mammals in South America

232 p., 19 p. of plates : ill., map ; 27 cm.Includes bibliographical references (p. 223-226) and index

Evolution of the Sirenia

p. 419-503 : ill., map ; 24 cm.Includes bibliographical references (p. 500-503)

Didelphidae

15 p. : ill. ; 26 cm.Includes bibliographical references (p. 15)."Late Tertiary beds in and around the Santa María valley of the Province of Catamarca, Argentina, were long known by the invalid name 'Araucanense' or derivatives therefrom. Thay can now be designated as a sequence of formations, from top to bottom: Corral Quemado, Andalgalá, Chiquimil A, and Chiquimil B. The Corral Quemado and Andalgalá formations are of Huayquerian (Pliocene, perhaps middle Pliocene) age. The age or ages of the Chiquimil are not adequately established. Didelphidae known from the Huayquerian of the Corral Quemado and Andalgalá are identified and a number of specimens described: Didelphis pattersoni, Lutreolina cf. crassicaudata, and ?Sparassocynus species innominata. Those three very different genera represent the reappearance in the known record of varied South American didelphids after a long gap from the Riochican (nominal late Paleocene) during which only a few quite different microbiotheres are known. The inferences are not only that sampling of small fossil mammals is inadequate in South America but also that much, perhaps most, of didelphid evolution was occurring outside the regions of known fossil fields"--P. 3

Age of mammals in South America

259 p., 46 p. of plates : ill. ; 27 cm.Includes bibliographical references (p. 251-254) and index

Extinct giant armadillo of Florida

10 p. : ill. ; 23 cm.Includes bibliographical references (p. 10

Saber-like canines

12 p. : ill. ; 24 cm.Includes bibliographical references (p. 12)."The sabertooth specialization has arisen independently at least three times among carnivorous mammals. Conflicting theories are that they were used for stabbing, for slicing, or for both, and that they were related to predaceous or to carrion-eating habits. 2. Stabbing with a curved tooth involves rotary motion, the center of which is not normally at an anatomical joint. Contrary to the most recent study, that of Bohlin, the mammalian saberteeth and the associated osteological and myological specializations are perfectly adapted for stabbing. 3. The known saber-like canines are ill-adapted for slicing, but doubtless could be and were used to make a short stabbing slice or gash. This function is considered secondary and the stabbing attack primary. 4. This primary adaptation of the canines and the general bodily structure are more consistent with predaceous habits than with carrion-eating. The various objections to the predaceous-stabbing theory seem all to be based on misapprehensions or to permit equally logical alternative deductions"--P. 11

Pleistocene felines of North America

27 p. : ill., map ; 24 cm.Includes bibliographical references (p. 25-27).North American fossil jaguars -- North American fossil pumas -- Panthera atrox -- Notes on limb bones -- Conspectus of large Pleistocene felines of North America