This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
S. R. Stinnesbeck, 2020 - Xibalbaonyx exinferis n. sp. (Megalonychidae), a new Pleistocene ground sloth from the Yucatán Peninsula, Mexico - Historical Biology (), - (journal article, English)
M. S. Bargo, 2019 - Early Miocene Sloths (Xenarthra, Folivora) From the Río Santa Cruz Valley (Southern Patagonia, Argentina), Ameghino, 1887 Revisited - Early–Middle Miocene Paleontology in the Río Santa Cruz, Southern Patagonia, Argentina. 130 years since Ameghino, 1887 (19), 102-137 (book chapter, English)
L. Varela, 2019 - Phylogeny, Macroevolutionary Trends and Historical Biogeography of Sloths: Insights From a Bayesian Morphological Clock Analysis - Systematic Biology (68), 204-218 (journal article, English)
L. B. Albright, 2019 - Cenozoic vertebrate biostratigraphy of South Carolina, U.S.A. and additions to the fauna - Bulletin of the Florida Museum of Natural History (57), 77-236 (journal article, English)
A. D. Rincón, 2019 - Two new megalonychid sloths (Mammalia: Xenarthra) from the Urumaco Formation (late Miocene), and their phylogenetic affinities - Journal of Systematic Palaeontology (17), 409-421 (journal article, English)
S. R. Stinnesbeck, 2018 - New insights on the paleogeographic distribution of the Late Pleistocene ground sloth genus Xibalbaonyx along the Mesoamerican Corridor - Journal of South American Earth Sciences (85), 108-120 (journal article, English)
H. G. McDonald, 2017 - Increased xenarthran diversity of the Great American Biotic Interchange: a new genus and species of ground sloth (Mammalia, Xenarthra, Megalonychidae) from the Hemphillian (late Miocene) of Jalisco, Mexico - Journal of Paleontology (91), 1069-1082 (journal article, English)
H. G. McDonald, 2017 - A new genus of megalonychid ground sloth (Mammalia, Xenarthra) from the late Pleistocene of Quintana Roo, Mexico - Journal of Vertebrate Paleontology (37), e1307-14 (journal article, English)
S. R. Stinnesbeck, 2017 - Xibalbaonyx oviceps, a new megalonychid ground sloth (Folivora, Xenarthra) from the Late Pleistocene of the Yucatán Peninsula, Mexico, and its paleobiogeographic significance - Paläontologische Zeitschrift (91), 245-271 (journal article, English)
D. Brandoni, 2017 - Chronological implications of the nothrotheriid ‘Xyophorus’ (Mammalia, Xenarthra) from the Collón Curá Formation (Miocene of Patagonia, Argentina) - Historical Biology (), - (journal article, English)
D. Brandoni, 2016 - Megatherioidea (Mammalia, Xenarthra, Tardigrada) from the Pinturas Formation (Early Miocene), Santa Cruz Province (Argentina) and their chronological implications - Paläontologische Zeitschrift (90), 619-628 (journal article, English)
G. De Iuliis, 2014 - Eucholoeops Ameghino, 1887 (Xenarthra, Tardigrada, Megalonychidae) from the Santa Cruz Formation, Argentine Patagonia: implications for the systematics of Santacrucian sloths - Geodiversitas (36), 209-255 (journal article, English)
A. L. Valerio, 2014 - Nueva evidencia de un estadio juvenil de Pliometanastes protistus y su relación con ?Pliometanastes galushai Hirschfeld & Webb, 1968 (Xernarthra, Megalonychidae) para el Mioceno Superior de Costa Rica - Revista Geológica de América Central (51), 159-163 (journal article, Spanish)
D. Brandoni, 2014 - A new genus of Megalonychidae (Mammalia, Xenarthra) from the late Miocene of Argentina - Revista Brasileira de Paleontologia (17), 33-42 (journal article, English)
J. S. Zijlstra, 2014 - New rodents (Cricetidae) from the Neogene of Curaçao and Bonaire, Dutch Antilles - Palaeontology (57), 895-908 (journal article, English)
H. G. McDonald, 2013 - A New Genus of Megalonychid Sloth (Mammalia, Xenarthra) from the Late Pleistocene (Lujanian) of Sierra De Perija, Zulia State, Venezuela - Journal of Vertebrate Paleontology (33), 1226-1238 (journal article, English)
D. Brandoni, 2013 - Los Tardigrada (Mammalia, Xenarthra) del Mioceno tardío de Entre Ríos Argentina - El Neógeno de la Mesopotamia argentina (14), 135-144 (journal article, Spanish)
A. Corona, 2013 - Catonyx cuvieri (Xenarthra, Mylodontidae, Scelidotheriinae) from the late Pleistocene of Uruguay, with comments regarding the systematics of the subfamily - Journal of Vertebrate Paleontology (33), 1214-1225 (journal article, English)
D. Brandoni, 2011 - The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Ríos Province, Argentina, with remarks on their systematics and biogeography - Geobios (44), 33-44 (journal article, English)
D. Brandoni, 2010 - On the systematics of Ortotherium Ameghino (Xenarthra, Tardigrada, Megalonychidae) from the 'Conglomerado osífero' (late Miocene) of Argentina - Journal of Vertebrate Paleontology (30), 975-980 (journal article, English)
D. Brandoni, 2009 - Descripción del fémur de Protomegalonyx chasicoensis Scillato-Yané (Mammalia, Xenarthra, Megalonychidae) de la Formación Arroyo Chasicó (Mioceno tardío), provincia de Buenos Aires, Argentina. Consideraciones sistemáticas sobre los perezosos de Edad Chasiq - Ameghiniana (46), 513-521 (journal article, Spanish)
C. Cartelle, 2009 - Systematic revision of tropical Brazilian scelidotheriine sloths (Xenarthra, Mylodontoidea) - Journal of Vertebrate Paleontology (29), 555-566 (journal article, English)
D. Brandoni, 2009 - On the presence of Pyramiodontherium (Mammalia, Xenarthra, Megatheriidae) in the late Miocene of northeastern Argentina and its biogeographical implications - Rivista Italiana di Paleontologia e Stratigrafia (115), 111-123 (journal article, English)
G. De Iuliis, 2009 - A new ground sloth (Mammalia: Xenarthra) from the Quaternary of Brazil - Comptes Rendus Palevol (8), 705-715 (journal article, English)
D. Brandoni, 2008 - Nuevos materiales de Ortotheriinae (Xenarthra, Tardigrada, Megalonychidae) procedentes del "Mesopotamiense" (Mioceno tardio) de Entre Rios - Instituto Superior de Correlacion Geologica (INSUGEO) Serie Miscelanea (17), 11-20 (journal article, Spanish)
C. Cartelle, 2008 - A new species of Megalonychidae (Mammalia, Xenarthra) from the Quaternary of Poço Azul (Bahia, Brazil) - Comptes Rendus Palevol (7), 335-346 (journal article, English)
H. G. McDonald, 2007 - Xenarthra - Evolution of Tertiary Mammals of North America (2), 147-160 (book/book chapter, English)
F. Pujos, 2007 - A peculiar climbing Megalonychidae from the Pleistocene of Peru and its implication for sloth history - Zoological Journal of the Linnean Society (149), 179-235 (journal article, English)
A. A. Carlini, 2005 - Los Xenarthra de Gran Barranca: Más de 20 Ma de historia - Actas del XVI Congreso Geológico Argentino. La Plata 2005 (), - (journal article, Spanish)
A. A. Carlini, 2004 - The oldest Megalonychidae (Xenarthra: Tardigrada); phylogenetic relationships and an emended diagnosis of the family - Neues Jahrbuch für Geologie und Paläontologie Abhandlungen (233), 423-443 (journal article, English)
R. D. E. MacPhee, 2003 - Domo de Zaza, an Early Miocene vertebrate locality in south-central Cuba, with notes on the tectonic evolution of Puerto Rico and the Mona Passage - American Museum Novitates (3394), 1-42 (journal article, English)
J. Alroy, 2002 - Synonymies and reidentifications of North American fossil mammals - (), - (unpublished, English)
A. L. Cione, 2000 - Miocene vertebrates from Entre Rios province, eastern Argentina - Serie Correlacion Geologica (14), 191-237 (journal article, English)
P. J. Adam, 1999 - Choloepus didactylus - Mammalian Species (621), 1-8 (journal article, English)
M. C. McKenna, 1997 - - Classification of Mammals Above the Species Level (), 1-640 (book, English)
T. J. Gaudin, 1995 - The ear region of edentates and the phylogeny of Tardigrada (Mammalia, Xenarthra) - Journal of Vertebrate Paleontology (15), 672-705 (journal article, English)
L. G. Marshall, 1991 - The Eocene to Pleistocene vertebrates of Bolivia and their stratigraphic context: a review - Fósiles y Facies de Bolivia - Vol. 1 Vertebrados (Revista Ténica de YPFB) (12), 631-652 (book/book chapter, English)
R. L. Carroll, 1988 - - Vertebrate Paleontology and Evolution (), 1-698 (compendium, English)
J. H. Hutchison, 1987 - Scapanus from California - Contributions in Science, Natural History Museum of Los Angeles County (386), 1-15 (journal article, English)
S. E. Hirschfeld, 1985 - Ground sloths from the Friasian La Venta fauna, with additions to the pre-Frasian Coyaima fauna of Colombia, South America - University of California Publications in Geological Sciences (128), 1-91 (journal article, English)
S. D. Webb, 1985 - New megalonychid sloths from El Salvador - The evolution and ecology of armadillos, sloths, and vermilinguas (), 113-120 (book chapter, English)
B. Kurten, 1980 - - Pleistocene mammals of North America (), 1-442 (book, English)
G. J. Scillato-Yané, 1980 - Nuevo Megalonychidae (Edentata, Tardigrada) del "Mesopotamiense" (Mioceno tardío-Plioceno) de la Provincia de Entre Ríos - Ameghiniana (17), 193-199 (journal article, Spanish)
E. P. Gustafson, 1978 - The Vertebrate Faunas of the Pliocene Ringold Formation, South-Central Washington - Bulletin of the Museum of Natural History, University of Oregon (23), 1-62 (journal article, English)
E. L. Lundelius, Jr., 1972 - Fossil Vertebrates from the Late Pleistocene Ingleside Fauna, San Patricio County, Texas - Bureau of Economic Geology Report of Investigations (77), 1-74 (journal article, English)
R. Pascual, 1971 - Mesa redonda: Evolución de las comunidades de los Vertebrados del Terciario argentino. Los aspectos paleozoogeográficos y paleoclimáticos - Ameghiniana (7), 372-412 (journal article, Spanish)
S. E. Hirschfeld, 1968 - Plio-Pleistocene Megalonychid Sloths of North America - Bulletin of the Florida State Museum (12), - (journal article, English)
R. Hoffstetter, 1954 - Les gravigrades (Edentes Xenarthres) des cavernes de Lagoa Santa (Minas Gerais, Bresil) - Annalles des Sciences Naturelles, Zoologie (11), 741-764 (journal article, French)
D. E. Savage, 1951 - Report on Fossil Vertebrates from the Upper Magdalena Valley, Colombia - Science (114), 186-187 (journal article, English)
E. H. Sellards, 1941 - Final report covering the period from March 4, 1939 ro September 30, 1941 for the state-wide paleontologic-mineralogic survey in Texas - A Federal Works Agency Work Projects Administration Project (), iii-85 (serial monograph, English)
G. Crile, 1940 - A record of the body weight and certain organ and gland weights of 3690 animals - Ohio Journal of Science (40), 219-259 (journal article, English)
C. L. Gazin, 1935 - Gravigrade Sloth Remains from the Late Pliocene and Pleistocene of Idaho - Journal of Mammalogy (16), - (journal article, English)
W. D. Matthew, 1931 - Genera and new species of ground sloths from the Pleistocene of Cuba - American Museum Novitates (511), 1-5 (journal article, English)
W. D. Matthew, 1924 - Third contribution to the Snake Creek Fauna - Bulletin of the American Museum of Natural History (50), 59-210 (journal article, English)
L. Kraglievich, 1923 - Un nuevo representante de la subfamilia "Ortotherinae" en la Formación Entrerriana de las Barrancas del Río Paraná "Torcellia paranense" n. gen. n. sp. - Comunicaciones de Historia Natural de Buenos Aires (2), 1-8 (journal article, Spanish)
L. Kraglievich, 1922 - Amphiocnus paranense n. gen. n. sp. Un probable precursor del "Megalocnus" de la isla de Cuba en la Formación Entrerriana - Physis (6), 73-87 (journal article, Spanish)
J. A. Allen, 1913 - New mammals from Colombia and Ecuador - Bulletin of the American Museum of Natural History (32), 469-484 (journal article, English)
W. J. Sinclair, 1905 - New Mammalia from the Quaternary caves of California - University of California Publication Bulletin of the Department of Geology (4), 145-161 (journal article, English)
F. Ameghino, 1902 - Première contribution à la connaissance de la fauna mammalogique des couches à Colpodon [First contribution to the knowledge of the mammalian fauna of the Colopdon Beds] - Boletin de la Academia Nacional de Ciencias de Córdoba (17), 71-141 (journal article, French)
O. P. Hay, 1902 - - Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey (179), 1-868 (serial monograph, English)
F. Ameghino, 1897 - Mammiféres crétacés de l’Argentine (Deuxième contribution à la connaissance de la fauna mammalogique de couches à Pyrotherium) [Cretaceous mammals of Argentina (second contribution to the knowledge of the mammalian fauna of the Pyrotherium Beds)] - Boletin Instituto Geografico Argentino (18), 406-521 (journal article, French)
R. Lydekker, 1894 - Contributions to a knowledge of the fossil vertebrates of Argentina. II. 2. The extinct edentates of Argentina - Anales del Museo de La Plata. Paleontología Argentina (3), 1-118 (journal article, English)
F. Ameghino, 1894 - Enumeration synoptique des especes de mammifères fossiles des formations éocènes de Patagonie - Boletin de la Academia Nacional de Ciencias en Cordoba (13), 259-452 (journal article, French)
J. Lindahl, 1892 - Description of a skull of Megalonyx leidyi, n. sp. - Transactions of the American Philosophical Society, New Series (17), 1-10 (journal article, English)
F. Ameghino, 1891 - Nuevos restos de mamíferos fósiles descubiertos por Carlos Ameghino en el Eoceno inferior de la Patagonia austral. – Especies nuevas, adiciones y correcciones [New remains of fossil mammals discovered by Carlos Ameghino in the lower Eocene of southern Pat - Revista Argentina de Historia Natural (1), 289-328 (journal article, Spanish)
F. Ameghino, 1885 - Nuevos restos de mamíferos fósiles Oligocenos recogidos por el Profesor Pedro Scalabrini y pertenecientes al Museo Provincial de la ciudad del Parana [New remains of Oligocene fossil mammals collected by Professor Pedro Scalabrini and belonging to the Pro - Boletín de la Academia Nacional de Ciencias (8), 1-205 (journal article, Spanish)
O. C. Marsh, 1874 - Notice of new Tertiary mammals. III - American Journal of Science (7), 531-534 (journal article, English)
J. Leidy, 1873 - Part I. Contributions to the extinct vertebrate fauna of the western territories - Report of the United States Geological Survey of the Territories (1), 1-358 (serial monograph, English)
J. Leidy, 1868 - Notice of Some Vertebrate Remains from Harden County, Texas - Proceedings of the Academy of Natural Sciences of Philadelphia (20), 174-176 (journal article, English)
J. Leidy, 1853 - [Dr. Leidy called the attention of the members to several fossil teeth] - Proceedings of the Academy of Natural Sciences of Philadelphia (6), 241- (journal article, English)
C. Illiger, 1811 - - Prodromus Systematis Mammalium et Avium (), - (book, other)
C. Linnaeus, 1758 - - Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis. Editio Decima (1), 1-824 (book, other)