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2000 by the American Society of Ichthyologists and Herpetologists COPEIA2000, No. 2 May 8
 

Summary: 2000 by the American Society of Ichthyologists and Herpetologists
COPEIA2000, No. 2 May 8
Copeia, 2000(2), pp. 341352
Molecular Phylogeny and Historical Biogeography of
Pacific Island Boas (Candoia)
CHRISTOPHER C. AUSTIN
The enigmatic biogeography of Pacific island boas of the genus Candoia is ex-
amined using DNA sequence variation from a portion of the mitochondrial cyto-
chrome b gene. Estimates of the phylogenetic relationships and genetic distances
between Candoia and the Old World (Sanzinia) and New World boids (Boa, Corallus,
and Epicrates) suggest that a recent dispersal event from the Americas is not re-
sponsible for Candoia's Papuan distribution. Multiple populations from the three
Candoia species are sampled to distinguish whether substantial evolutionary parti-
tions exist within species as a result of colonization patterns or geographical barriers
and to assess whether genetic partitions are concordant with species boundaries. In
all analyses, Candoia and the Madagascan Sanzinia are sister taxa, and C. bibroni is
basal to C. aspera and C. carinata. Mean sequence divergences between Candoia and
the other boid genera Sanzinia, Corallus, Epicrates, and Boa are 0.19, 0.23, 0.24, and
0.25, respectively. Within Candoia, mean interspecific sequence divergence ranges
from 0.13, between C. aspera and C. bibroni, to 0.16 for both C. aspera/C. carinata

  

Source: Austin, Christopher C. - Museum of Natural Science, Louisiana State University

 

Collections: Environmental Sciences and Ecology