Morphology of hair of two-and three-toed sloths (Edentata: Bradypodidae)

Wujek, Daniel E. ^[1] ; Cocuzza, Joan M. ^[1]
1. [1] Central Michigan University
  
  Central Michigan University
  
  City of Mount Pleasant, Estados Unidos
Localización: Revista de Biología Tropical, ISSN 0034-7744, Vol. 34, Nº. 2, 1986 (Ejemplar dedicado a: Volume 34 – Regular number 2 – November 1986; 163–166)
Idioma: inglés
Títulos paralelos:
- Morphology of hair of two-and three-toed sloths (Edentata: Bradypodidae)
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Resumen
- español
  Los pelos del perezoso de dos dedos, Choloepus hoffmanni, tienen estrías longitudinales y una corteza uniforme (vista en corte transversal). Los pelos del perezoso de tres dedos, Bradypus variegatus, tienen fisuras transversales irregulares y una corteza con "fusi" diseminados. Las diferencias macromorfológicas apoyan la separación de ambos géneros en familias diferentes.
- English
  Micromorphological differences between hairs of the two-toed sloth (Choloepus hoffmanni) and of the three-toed sloth (Bradypus variegatus) were observed by means of scanning electron microscopy. Hairs of the two-toed sloth had longitudinal grooves which exposed a uniform cortex when viewed in cross section. Hairs of the three-toed sloth have irregular transverse fissures and a cortex that contains scattered fusi. These morphological differences support the placement of the two sloth genera into separate familes. Hairs of four other xenarthran species are al so illustrated.