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Cabral, AMS, CP da Costa and SE Huggins. 1980. Cardiac output in the three-toed sloth, Bradypus tridactylus. Comparative Biochemistry and Physiology A 67(3): 527-530.

Cabrera, Á. 1914. Código de nomenclatura zoológica rigente en la actualidad. Boletin de la Real Sociedad española de Historia Natural 1914: 312-337.

––– 1928. Sobre algunos megatterios pliocenos. Revista del Museum La Plata 31: 339.

––– 1929. Sobre la estuctura de la mano y del pié en el megatério. Anales de la Sociedad Científica Argentina 107: 425-443.

––– 1936. Las especies del genero "Glossotherium." Notas del Museo de La Plata 1(5): 193-206.

––– 1939a. Un nuevo representante Santacrucense de la Familia Megatheriidae. Notas Museum La Plata, Sección Paleontolgia 20: 475-483.

––– 1939b. Sobre vertebrados fósiles del Plioceno de Adolfo Alsina. Revista del Museo de La Plata 2: 3-35. (type description: Elassotherium, E. altirostre)

––– 1958. Catologo de los Mammiferos de American del Sur. Revista del Museum Argentinoa Ciencias Nacional  "Bernardino Rivadavia" 4: 1-308.

Calcaterra, A. 1973. El genero Lestodon (Edentata-Mylodontidae)-Esdtudio preliminar. Comunicaciones Paleontologicas del Museo Municipal Real de San Carlos 1: 1-31.

Callens, M J Colle, MA Gerebtzoff and M Goffart. 1965. Excitatory and depressive phenomena in the olfactory system of the sloth (Choloepus hoffmanni Peters). Archives Internationales de Physiologie et de Biochemie 73: 748-761.

Carlini, AA and GJ Scillato-Yané. 1999. Evolution of Quaternary Xenarthrans (Mammalia) of Argentina. Quaternary of South America and Antarctic Peninsula 12: 149-175.

–––, GJ Scillato-Yané, JI Noriega and F Acenolaza. 2000. Perezosos terrestres (Xenarthra, Tardigrada) del 'Mesopotamiense' (Fm. Ituzaingo, Micoceno tardio-Plioceno temprano) de la Provincia de Entre Rios, Argentina. Studia Geologica Salmanticensia 36: 13-27.

–––, GJ Scillato-Yané and R Sánchez. 2006. New Mylodontoidea (Xenarthra, Phyllophaga) from the middle Miocene-Pliocene of Venezuela. Journal of Systematic Paleontology 4(3): 255-267.

Carneiro Filho, J. 1953. Histologia e histoquimica da adrenal da preguiça (Bradypus tridactylus). Anais da Academia Brasileira de Ciencias 25: 309-317.

Carpenter, MC and JI Mead. 1999. Late Pleistocene vertebrate communities of the lower Grand Canyon; Rampart and Muav caves. Journal of Vertebrate Paleontology 19(3, Suppl.): 36.

Carranza Castañeda, O and WE Miller. 2004. Late Tertiary terrestrial mammals from Central Mexico and their relationship to South American immigrants. Revista Brasileira de Paleontologia 7(2): 249-261.

Cartelle, C. 1980. Estudo comparativo do radio e esqueleto da mão do Glossotherium (Ocnotherium) giganteum Lund, 1842. Anais da Academia Brasileira de Ciências 52: 359-377.

––– 1991. Um novo Mylodontinae (Edentata, Xenarthra) do Pleistoceno final da região intertropical brasileira. Anais da Academia Brasileira de Ciências 63: 161-170. (type description, Mylodonopsis)

––– 1992. Edentata e megamamiferos herivoros extintos da Toca dos Ossos (Ourolândia, Bahia, Brazil). Tese de Doutorado, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil, 300pp.

Cartelle, C and JS Fonseca. 1981. Especies do gênero Glossotherium no Brasil. Anais do II Congresso Latino-Americano de Paleontologia 2(2): 805-818.

––– and GA Bohórques. 1982. Eremotherium laurillardi Lund, 1842. Parte I. Determinaço especifica e dimorfismo sexual. Iheringia, Série Geológica 7: 45-63.

––– and GA. Bohórques. 1986a. Presença de ossículos dérmicos em Eremotherium laurillardi (Lund) Cartelle & Bohórquez, 1982. (Edentata, Megatheriidae). Iheringia, Série Geológica 11: 3-8.

––– and ––– 1986b. Descrição das prémaxilas de Nothrotherium maquinense (Lund) Lydekker, 1889 (Edentata, Megalonychidae) e de Eremotherium laurillardi (Lund) Cartelle and Bohórques, 1982 (Edentata, Megatheriidae). Iheringia, Séria Geólogica 11: 9-14.

––– and G De Iuliis. 1995. Eremotherium laurillardi: the Panamerican Late Pleistocene megatheriid sloth. Journal of Vertebrate Paleontology 15(4): 830-841.

––– and JS Fonseca. 1983. Contribuiçào ao melhor conhecimento da pequena preguiça terrícola Nothrotherium maguinense (Lund) Lydekker, 1889. Lundiana 2: 127-181.

de Carvalho, CT. 1960. Notes on the Three-toed sloth, Bradypus tridactylus. 24: 155-156.

Casamiquela, R. 1974. El bipedismo de los megaterioides. Estudio de pisadas fósiles en la formación Río Negro típica. Ameghiniana 11: 249-282.

––– and R Sepulveda. 1974. Catalogación crítica de algunos vertebrados fósiles Chilenos. III: Los megaterioideos. Sobre Megatherium medinae Philippi. Ameghiniana 11(2): 97-123.

Casinos, A. 1996. Bipedalism and quadrupedalism in Megatherium:  an attempt at biomechanical reconstruction. Lethaia 29: 87-96.

Cassano, CR, MCM Kierulff, and AG Chiarello. 2011. The cacao agroforests of the Brazilian Atlantic forest as habitat for the endangered maned sloth Bradypus torquatus. Mammalian Biology 76: 243-250.

Castro, B. 1996. Sloths: are they running away from us? An overview of the natural history, husbandry and identification of sloth (Choloepus didactylus and Choloepus hoffmanni). American Zoo and Aquarium Association Regional Conference Proceedings 1996: 234-238.

Cattoi, N. 1962. Un nuevo (Xenarthra) del Terciario de Patagonia, Chubutherium ferelloii gen. et sp. nov. (Megalonychoidea, Mylodontidae). Revista del Museum Argentinoa Ciencias Nacional  "Bernardino Rivadavia" Zool. 8(11): 123-133. (type description, Chubutherium)

Cession-Fossion, A and J Leconte. 1962. Présence d'hstamine et de substance P dans certains tissus de l'unau (Choloepus hoffmanni). Archives Internationales de Physiologie et de Biochemie 70: 397-400.

Chagas, RRD, JP Souza-Alves, L Jerusalinsky and SF Ferrari. 2009. New Records of Bradypus torquatus (Pilosa: Bradypodidae) from Southern Sergipe, Brazil. Edentata 8-10: 21-23.

Chaminaud, R. 1946. Sobre un astragalo de Nothrotherium torresi Kraglevich en el cuaternario inferior santafesino. Cienc. e Inves., Buenos Aires 2(3): 136-138.

Chiarello, AG. 1998a. Activity budgets and ranging patterns of the the Atlantic forest maned sloth, Bradypus torquatus. Journal of Zoology 246(1): 1-10.

––– 1998b. Diet of the Atlantic forest maned sloth, Bradypus torquatus. Journal of Zoology 246(1): 11-19.

–––  2008. Sloth ecology: an overview of field studies. In SF Vizcaíno and WL Loughry (eds), The Biology of the Xenarthra. University of Florida Press, Gainesville. Pp. 269-280.

–––, Chivers, D.J., Bassi, C., Maciel, M.A., Moreira, L. and Bazzalo, M. 2004. A translocation experiment for the conservation of maned sloths, Bradypus torquatus (Xenarthra: Bradypodidae). Biological Conservation 118: 421-430.

Christensen, HA and A Herrer. 1979. Susceptibility of sand flies (Diptera: Psychodidae) to Trypanosomatidae from two toes sloth (Edentata: Bradypodidae). Journal of Medical Entomology 16(5): 424-427.

Christensen, P. and RA Fariña. 2003. Mass estimation of two fossil ground sloths (Mammalia, Xenarthra, Mylodontidae). Pp. 1-8 In RA Fariña, SF Vizcaíno and G Storch (eds.), Morphological studies in fossil and extant Xenarthra (Mammalia). Senckenberiana Biologica 83(1).

de Cingolani, GEC, MC de Araujo Fraga and VL de Menezes Lima. 1979. Glucose metabolism by isolated fat cells from sloth. Archives Internationales de Physiologie et de Biochimie 87(1): 65-71.

Cisneros, JC. 2005. New Pleistocene vertebrate fauna from El Salvador. Revista Brasileira de Paleontologia 8(3): 239-255.

Clauss, M. 2004. The potential interplay of posture, digestive anatomy, density of ingesta and gravity in mammalian herbivores: why sloths do not rest upside down. Mammal Review 34(3): 241-245.

Claypole, EW. 1891a. Megalonyx in Holmes County, Ohio. Part I. American Geology 7(2): 122-132.

––– 1891b. Megalonyx in Holmes County, Ohio. Part. II. American Geology 7(3): 149-153.

Cockerell, TDA. 1909. A fossil ground sloth in Colorado. University of Colorado Studies 6(4): 309-312.

Conner, JE. 1983. Paleoecological implications of the mammalian fauna of lower Sloth Cave, Guadalupe Mountains, Texas. Bulletin of the National Speleological Society 45(1): 3-11.

Cope, ED. 1871. Preliminary report on the vertebrata discovered in the Port Kennedy Bone Cave. American Philosophical Society 12: 73-102. (type description, Megalonyx loxodon, M. wheatleyi, and M. tortulus)

––– 1889. The Edentata of Norrth America. American Naturalist 23: 657-664.

––– 1893. A preliminary reporrt on the vertebrate paleontology of the Llano Estacado. 4th Annual Report on the Geological Survey of Texas: 136pp. (type description, Megalonyx leptostomus)

––– 1896. On some Pleistocenee mammalia from Petite Anse, La. Proceedings of the American Philosophical Society 33: 458-468.

––– 1899. Vertebrate remains from Port Kennedy bone deposit. Journal of the Academy of Natural Sciences Philadelphia 11(2): 193-267. (type description, Megalonyx scalper)

Coombs, MC.  1983. Large mammalian clawed herbivores: A comparative study. Transactions of the American Philosophical Society 73(7):  1-96.

da Costa, BLSA, VF Pessoa, JD Bousfield and RJ Clarke. 1987. Unusual distribution of ganglion cells in the retina of the three-toed sloth (Bradypus variegatus). Brazilian Journal of Medical and Biological Research 20(6): 741-748.

–––, –––, ––– and ––– 1989. Ganglion cell size and distribution in the retina of the two-toed sloth (Choloepus didactylus L.). Brazilian Journal of Medical and Biological Research 22(2): 233-236.

Cuvier, G. 1796. Notice sur le squellette d'une très grande espèce de quadrupède inconnue jusqu'à présent, trouvé au Paraquay, et déposé au cabinet d'histoire naturelle de Madrid. Magasin encyopédique, ou Journal des Sciences, des Lettres et des Arts (1): 303-310; (2): 227-228. (type description, Megatherium)

––– 1804. Sur le Megatherium. Annales du Museum d'Historie Naturelle: 376-400.

––– 1823. Sur le Megatherium. Réchèrches sur les Ossements Fossiles 2nd ed, tome 5: 174-192.

––– 1836. Recherches sur les Ossemens fossiles 4th ed, tome 8: 303-370.