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Nagy, K. A., and G. G. Montgomery.  1980.  Field metabolic rate, water flux, and food consumption in three-toed sloths (Bradypus variegatus).  Journal of Mammalogy, 61(3): 465-472.

Naples, V. L.  1980.  Cranial morphology and evolution of the sloths.   Ph.D. Dissertation, University of Massachusetts, Amherst, Massachusetts.  237 pp.

-------- 1981.  'Cusp' development in sloth cuspless teeth.  Journal of Dental Research, 60(A): 433.

-------- 1982.  Cranial osteology and function in the tree sloths, Bradypus and Choloepus.  American Museum Novitates, 2739: 1-41.

-------- 1985a.  Form and function of the masticatory musculature in the tree sloths, Bradypus and Choloepus.  Journal of Morphology, 183:25-50.

-------- 1985b.  The superficial facial musculature in sloths and vermilinguas (anteaters).  Pp. 173-189.  In G. G. Montgomery (ed.), The Evolution and Ecology of Armadillos, Sloths, and Vermilinguas.  Smithsonian Institution Press, Washington, D.C.

-------- 1986.  The morphology and function of the hyoid region in the tree sloths, Bradypus and Choloepus.  Journal of Mammalogy, 67: 712-724.

-------- 1987a.  Reconstruction of cranial morphology and analysis of function in the Pleistocene ground sloth Nothrotheriops shastense (Mammalia, Megatheriidae).  Contributions in Science, Natural History Museum of Los Angeles County, 389: 1-21.

-------- 1987b.  Development of dental wear patterns in Nothrotheriops shastense Journal of Vertebrate Paleontology, 7(3, Suppl.):21.

-------- 1989.  The feeding mechanism in the Pleistocene ground sloth, Glossotherium.  Contributions in Science, Natural History Museum of Los Angeles County, 415: 1-23.

-------- 1990.  Morphological changes in the facial region and a model of dental growth and wear pattern development in Nothrotheriops shastensis.  Journal of Vertebrate Paleontology, 10(3): 372-389.

-------- 1993.  Interpretation of masticatory function, based upon study of cranial structure and experimental production of wear surfaces on model teeth in Eremotherium Journal of Vertebrate Paleontology, 13(3, Suppl.): 51.

Nordenskjöld, E.  1899.  La Grotte du Glossotherium (Neomylodon) en Pagatonie.  Comptes Rendus, 129: ?

-------- 1900.  Jackttagelser och fynd I Grottor vid Última Esperanza y sydvestra patagonien. Loglinga svenska vetenskaps- Akademien Handlingar, 33(3): 1-24.


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