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Waage, J. K.  1976.  Insect remains from ground sloth dung.  Journal of Paleontology, 50(5): 991.

-------- 1980.  Sloth moths and other zoophilous Lepidoptera.  Proceedings and Transactions of the British Entomological and Natural History Society, 13(3-4): 73-74.

Wallace, C. and Y. C. Oppenheim.  1996.  Hematology and serum chemistry profiles of captive Hoffmann's two-toed sloths (Choloepus hoffmanni).  Journal of Zoo and Wildlife Medicine, 27(3): 339.

Watillon, M.  1969.  The eye of the sloth (Choloepus hoffmanniI Peters).  Acta Zoologica Pathol. Antverpiensia, 49: 107-122.

-------- and M. Goffart.  1965.  Implications physiologiques de la structure de l'oeil du paresseux (Choloepus hoffmanni Peters).  Archives Internationales de Physiologie et de Biochemie, 73: 163-166.

Webb, S. D.  1980a.  Biostratigraphy and biogeography of late Cenozoic megalonychid sloths (Mammalia; Edentata).  Abstracts with Programs - Geological Society of America, 12 (4): 211.

-------- 1980b.  North American mammalian chronology and the Interamerican interchance.  Abstracts with Programs - Geological Society of America, 12 (7): 546.

-------- 1985.  The interrelationships of tree sloths and ground sloths;  pp. 105-112 in G. G. Montgomery (ed.), The Evolution and Ecology of Armadillos, Sloths, and Vermilinguas.  Smithsonian Institution Press, Washington, D.C.

-------- 1989.  Osteology and relationship of Thinobadistes segnis, the first mylodont sloth in North America; pp. 496-532 in K. H. Redford and J. F. Eisenberg (eds.), Advances in Neotropical Mammalogy, Sandhill Crane Press, Gainesville. (type description, Thinobadistes segnis)

-------- and S. Perrigo.  1985.  New megalonychid sloths from El Salvador;  pp. 113-120 in G. G. Montgomery (ed.), The Evolution and Ecology of Armadillos, Sloths, and Vermilinguas.  Smithsonian Institution Press, Washington, D.C. (type description, Megalonyx obtusidens and Meizonyx salvadorensis)

Weiss, C. S.  1827.  Über das südliche Ende des Gebirgszuges van Brazilien, etc. nach den Sammlungen des Herrn Fr. Sellow.  Abhandlungen der Kön.  Akademie der Wissenschaften zu Berlin.  Pp. 217-293. (Glyptodon referred to as Megatherium)

Wetzel, R. M.  1982.  Systematics, distribution, ecology, and conservation of South American Edentates.  pp. 345-375.  In M. A. Mares and H. H. Genoways (Eds.), Mammalian Biology in South America, Special Publication Series, Pymatuning Laboratory of Ecology, VI.  Linesville, University of Pittsburgh.

-------- 1985.  The identification and distribution of Recent Xenarthra (=Edentata); pp. 5-21 In G. G. Montgomery (ed.), The Evolution and Ecology of Armadillos, Sloths, and Vermilinguas.  Smithsonian Institution Press, Washington, D.C.

Wetzel, R. M. and D. Kock.  1973.  The identity of Bradypus variegatus Schinz (Mammalia, Edentata).  Proceedings of the Biological Society of Washington, 86(3): 25-34.

-------- and F. D. de Avila-Pires.  1980.   Identification and distribution of the recent sloths of Brazil (Edentata).  Review of Brazilian Biology, 40: 831-836.

White, J. L.  1993a.  Functional and phylogenetic implications of the postcranial skeleton of fossil sloths for the evolution of arboreality in tree sloths.  Ph.D. dissertation, State University of New York at Stonybrook.  Stonybook, New York, 835 pp.

-------- 1993b.  Indicators of locomotor habits in Xenarthrans:  Evidence for locomotor heterogeneity among fossil sloths.  Journal of Vertebrate Paleontology, 13(2): 230-242.

-------- 1997.  Locomotor adaptations in Miocene Xenarthrans.  Pp. 246-264 in R. F. Kay, R. H. Madden, R. L. Cifelli, and J. J. Flynn (Eds.).  Vertebrate Paleontology in the Neotropics: the Miocene Fauna of La Venta, Colombia.  Smithsonian Institution Press, Washington, D. C.

-------- and R. D. E. MacPhee.  2001.  The sloths of the West Indies: a systematic and phylogenetic review.  Pp. 201-235 in C. A. Woods and F. E. Sergile (Eds.).  Biogeography of the West Indies: Patterns and Perspectives.

Wilson, R. W.  1942.  Preliminary study of the fauna of Rampart Cave, Arizona.  Contributions to Paleontology, Carnegie Institution of Washington, 530: 169-185.

Wilson, M. C., H. G. McDonald and C. L. Hill.  2005.  Fossil ground sloths, Megalonyx and Paramylodon (Mammalia; Xenarthra), from the Doeden local fauna, Montana.  Current Research in the Pleistocene, 22: 83-85.

Windle, B. C. A., and F. G. Parsons.  1899.  On the myology of Edentata.  Proceedings of the Zoological Society of London: 314-338, 990-1017.

Winge, H.  1915.  Jordfundne og nulevende Gumlere (Edentata) fra Lagoa Santa, Minas Geraes, Brasilien.  Med Udsigt over Gumlernes indbyrdes Slaegtskab. E  Museo Lundii, 3: 1-321.

-------- 1941.  Edentates (Edentata), pp. 319-411.  In (A. S. Jensen, R. Spärck, and H. Volsøe, eds.) The interrelationships of the mammalian genera.  Volume 1: Monotremata, Marsupialia, Insectivora, Chiroptera, Edentata.  København, Denmark.

Winslow, J. H.  1975.  Mr. Lumb and Masters Megatherium: an unpublished letter by Charles Darwin from the Falklands.  Journal of Historical Geography, 1(4): 347-360.

Wislocki, G. B.  1927.  On the placentation of the tridactyl sloth (Bradypus griseus) with a description of some characteristics of the fetus.  Contributions to Embryology, Carnegie Institution Publication, 19: 209-228.

-------- 1928a.  Observations on the gross and microscopic anatomy of the sloths (Bradypus griseus griseus Gray and Choloepus hoffmanni Peters).  Journal of Morphology and Physiology, 46: 317-377.

-------- 1928b.  Further observations upon the minute structure of the labyrinth in the placenta of the sloth.  Anatomical Record, 40: 385-395.

-------- and R. K. Enders.  1935.  Body temperatures of sloths, anteaters, and armadillos.  Journal of Mammalogy, 16: 328-329.

Woodburne, M. O.  1969.  A Late Pleistocene occurrence of the collared peccary, Dicotyles tajacu, in Guatemala.  Journal of Mammalogy, 50(1): 121-125.

Woodward, A. S.  1900.  On some remains of Grypotherium (Neomylodon) listai and associated mammals from a cavern near Consuelo Cove, Last Hope Inlet.  Proceedings of the Zoological Society of London, 1900(5): 64-79.

Wujek, D. E. and P. Timpano.  1986.  Rufusia (Porphyridiales, Phragmonemataceae), a new red alga from sloth hair.  Brenesia, 25-26: 163-168.


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