The historical identification of the Brazilian 'north-eastern' zorro as Dusicyon vetulus is questioned in relation to its incrimination as a reservoir of Leishmania chagasi, the agent of American visceral leishmaniasis. Comparative cranial and dental morphology showed that specimens of this north-eastern species more closely resemble the crab-eating zorro Cerdocyon thous, conforming with the documented geographical ranges of the respective species. We conclude that the single 'wild' canid host of L. chagasi in the neotropics in C. thous.
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Courtenay et al. (1996) studied this question.
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