| first record of amblyomma aureolatum (pallas, 1772) (acari: ixodidae) parasitizing alouatta guariba (humboldt) (primata: atelidae) in southern brazil. | a female of amblyomma aureolatum was found on the howler monkey alouatta guariba, in cachoeira do sul, rio grande do sul, southern brazil. this is the first record of this tick species parasitizing this primate species in brazil. | 2006 | 17196126 |
| survey of alouatta caraya, the black-and-gold howler monkey, and alouatta guariba clamitans, the brown howler monkey, in a contact zone, state of rio grande do sul, brazil: evidence for hybridization. | sympatry and natural hybridization between howler monkey taxa (alouatta spp.) has only recently being confirmed in the wild. surveys in areas of potential contact between the distribution of two taxa have shown that sympatry is rare, although more common than previously known. here we report the results of a survey conducted in a contact zone between the only two sexually dichromatic howler monkey taxa, alouatta caraya and a. guariba clamitans, in são francisco de assis, state of rio grande do s ... | 2008 | 18654738 |