Journal
MEMORIAS DO INSTITUTO OSWALDO CRUZ
Volume 95, Issue 4, Pages 583-588Publisher
FUNDACO OSWALDO CRUZ
DOI: 10.1590/S0074-02762000000400023
Keywords
Euleishmania; Paraleishmania; Leishmania evolution; biogeographical associations; phylogeny
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Recently two hypotheses have been proposed for the evolution of Leishmania involving respectively a Neotropical or Paleartic origin for the species. Here an alternative proposal on the phylogeny of Leishmania based on the major divisions within the genus is presented. In this hypothesis a Neotropic origin is retained for L. (Viannia) and Paraleishmania, a recently desribed section within the genus Leishmania, while an African origin is proposed for L. (Leishmania) and possibly Sauroleishmania. The current distribution of Leishmania in the Neotropics is explained as the product of multiple introductions of Leishmania parasites into the New World. Problems with organismal identity in Sauroleishmania and the use of molecular sequence data in inferring phylogenies are also discussed.
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