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McCrane, MP. 1966. Birth, behavior and development of a hand reared two-toed sloth, Choloepus didactylus. International Zoo Yearbook 6: 187-189.

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––– 1987. A systematic review of the Plio-Pleistocene scelidotheriine ground sloths (Mammalia:  Xenarthra:  Mylodontidae). Ph.D. dissertation, University of Toronto. Toronto, Canada, 499 pp.

––– 1992. Chester's sloths; the ground sloths of Rancho La Brea. Terra 31(1): 32-33.

––– 1993. Harlan's ground sloth, Glossotherium harlani, from Pauba Mesa, Orange County, California. San Bernardino County Museum Association Special Publication, Ashes, Faults and Basins 93(1): 101-103.

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––– and DC Anderson. 1983. A well-preserved ground sloth (Megalonyx) cranium from Turin, Monona County, Iowa. Proceedings of the Iowa Academy of Sciences 90: 134-140.

––– and CE Ray. 1990. The extinct sloth, Megalonyx, (Mammalia:  Xenarthra) from the United States Mid-Atlantic continental shelf. Proceedings Biological Society Washington 103: 1-5.

–––, WE Miller and TH. Morris.. 2001. Taphonomy and significance of Jefferson's ground sloth (Xenarthra: Megalonychidae) from Utah. Western North American Naturalist 61(1): 64-77.

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Mendel, FC 1979. The wrist joint of two-toed sloths: its relevance to brachiating adaptations in the Hominoidea. Journal of Morphology 162: 413-424.

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––– 1985a. Use of hands and feet of three-toed sloths (Bradypus variegatus) during climbing and terrestrial locomotion. Journal of Mammalogy 66: 359-366.

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–––, D Piggins and DR Fish. 1985. Vision of the two-toed sloths (Choloepus). Journal of Mammalogy 66(1): 197-200.

Menegaux, A. 1908. Sur le squelette du membre antérieur de Bradypus torquatus, Ill. Comptes Rendus de l'Académie des Sciences 147: 637-640.

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Mercer, HC. 1897. The finding of the remains of the fossil sloth at Big Bone Cave, Tennessee, in 1896. Proceedings of the American Philosophical Society 36(154): 36-70.

Meritt, DA. 1970. Edentate diets currently in use at Lincoln Park Zoo, Chicago. International Zoo Yearbook 10: 136-138.

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––– 1973. Edentate diets II. Two-toed sloths. Laboratory Animal Science 23(4): 543-545.

––– 1974. A further note on the immobilization of sloths. International Zoo Yearbook 14: 160-161.

––– 1976a. A simplified method for diagnosing parturition in Hoffmann's sloth, Choloepus hoffmanni. International Zoo Yearbook 16: 152-153.

––– 1976b. Sex ratios of Hoffmann's sloth, Choloepus hoffmanni Peters and three-toed sloth, Bradypus infuscatus Wagler in Panama. American Midland Naturalist 96(2): 472-473.

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––– 1985. Sobre las fechas de publicacion de 'fossil Mammalia' (1838-1840) de Richard Owen. Comunicaciones Paleontologicas del Museo de Historia Natural de Montevideo 1(12): 199-200.

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––– and ––– 1986. Description de un milodontido del Blancano temprano de la mesa central de Mexico. Revista do Insituto Geologico (Sao Paulo) 6(2): 193-203.

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––– and –––. 1974. Contact-distress calls of young sloths. Journal of Mammalogy 55(1): 211-213.

––– and –––. 1975. Impact of sloths on Neotropical forest energy flow and nutrient cycling. In FB Golley and E Medina (Eds.) Tropical Ecology Systems: Trends in Terrestrial and Aquatic Research. Ecology Studies 11, Springer-Verlag, New York. Pp. 69-111.

––– and –––. 1978. Habitat selection and use by two-toed and three-toed sloths. In GG Montgomery (ed.), The Ecology of Arboreal Folivores. Smithsonian Institution Press, Washington, D.C. Pp. 329-359.

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