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Chromosoma

, Volume 110, Issue 3, pp 241–246 | Cite as

Molecular phylogenetics of howler monkeys (Alouatta, Platyrrhini)

A comparison with karyotypic data
  • Cibele R. Bonvicino
  • Bernardo Lemos
  • Héctor N. Seuánez
Original Article

Abstract.

Molecular phylogenetic analyses of seven Brazilian Alouatta species, based on cytochrome b DNA sequence data were carried out. Parsimony and neighbor joining topologies grouped Alouatta belzebul and A. fusca as sister groups in one clade while another, well-supported clade contained A. seniculus as the most basal offshoot, followed by A. nigerrima as a sister lineage of A. macconnelli/A. stramineus. Estimates of inter-specific sequence divergence were generally low, and estimates of the time of divergence indicated that the main Alouatta lineages emerged during a short evolutionary interval. A comparison with karyotypic data confirmed the molecular topology showing a closer relationship between A. macconnelli and A. stramineus in respect to A. nigerrima. It also showed that the XX/XY sex chromosome system was maintained in several lineages while the X1X2Y/X1X1X2X2 system appeared independently at least three times during the radiation of howler monkeys. Moreover, the X1X2Y1Y2/X1X1X2X2 system might have appeared once or, alternatively, twice and independently.

Keywords

Phylogenetic Analysis Sequence Data Sequence Divergence Sister Group Fusca 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Cibele R. Bonvicino
    • 1
  • Bernardo Lemos
    • 1
  • Héctor N. Seuánez
    • 1
  1. 1.Division of Genetics, Instituto Nacional de Câncer, Rio de Janeiro, Brazil

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