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Choloepus hoffmanni


Taxonavigation: Folivora 

Superregnum: Eukaryota
Regnum: Animalia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Ordo: Therapsida
Cladus: Theriodontia
Subordo: Cynodontia
Infraordo: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohort: Theria
Cohort: Eutheria
Cohort: Placentalia
Superordo: Xenarthra
Ordo: Pilosa
Subordo: Folivora

Familia: Megalonychidae
Genus: Choloepus
Species: C. didactylus – C. hoffmanni


Type species: Bradypus didactylus Linnaeus, 1758, by subsequent designation (Gray 1827: 275; misspelled Chaelopus).


  • Unaüs Rafinesque, 1815: 57

Type species: Bradypus unau Link, 1795, by subsequent designation (Palmer 1904: 700) [corrected spelling is Unaues Rafinesque, 1815 according ICZN 1999: Art. 32.5.

  • Choelopus Lichtenstein, 1818: 20 [incorrect subsequent spelling of Choloepus Illiger].
  • Unaus Gray, 1821: 305

Type species: Bradypus didactylus Linnaeus, 1758, by monotypy.

  • Cholaepus Schinz, 1821: 328 [incorrect subsequent spelling of Choloepus Illiger].
  • Cholaepus Gray, 1825: 343 [incorrect subsequent spelling of Choloepus Illiger].
  • Chaelopus Gray, 1827: 275 [incorrect subsequent spelling of Choloepus Illiger].
  • Choelopus Sclater, 1873: 253 [incorrect subsequent spelling of Choloepus Illiger].
  • Cholopus Agassiz, 1847: 83 [unjustified emendation of Choloepus Illiger].
  • Choelopus Sanborn, 1953: 5 [incorrect subsequent spelling of Choloepus Illiger].


Primary references[edit]

  • Illiger, J.K.W. 1811. Prodromus systematis mammalium et avium additis terminis zoographicis utriusque classis, eorumque versione germanica. Berolini: C. Salfield. xviii + 302 pp. BHL Reference page. 
  • Rafinesque, C.S. 1815. Analyse de la nature, ou tableau de l’univers et des corps organisés. Palerme: l’Imprimerie de Jean Barravecchia, 224 pp.
  • Gray, J.E. 1821. On the natural arrangement of vertebrose animals. London Med. Reposit. 15: 297–311.
  • Gray, J.E. 1827. A synopsis of the species of the class Mammalia. In The animal kingdom arranged in conformity with its organization, by the Baron Cuvier, with additional descriptions of all the species hitherto named, and of many not before noticed, by Edward Griffith . . . and others, ed. E. Griffith, 1–296. London: Geo. B. Whittaker, 5: 1–392.
  • Palmer, T.S. 1904. Index generum mammalium: A list of the genera and families of mammals. N. Amer. Fauna 23: 1–984.


Vernacular names[edit]

English: Two-toed Sloths
日本語: フタユビナマケモノ属