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Characters derived from advertisement calls, morphology, allozymes, and
the sequences of the small subunit of the mitochondrial ribosomal gene
(12S) and the COI mitochondrial gene were used to estimate the phylogeny
of frogs of the Physalaemus pustulosus group (Leptodactylidae). The
combinability of these data partitions was assessed in several ways:
measures of phylogenetic signal, character support for trees, congruence
of tree topologies, compatibility of data partitions with suboptimal
trees, and homogeneity of data partitions. Combined parsimony analysis of
all data equally weighted yielded the same tree as the 12S partition
analyzed under parsimony and maximum likelihood. The COI, allozyme, and
morphology partitions were generally congruent and compatible with the
tree derived from combined data. The call data were significantly
different from all other partitions, whether considered in terms of tree
topology alone, partition homogeneity, or compatibility of data with trees
derived from other partitions. The lack of effect of the call data on the
topology of the combined tree is probably due to the small number of call
characters. The general incongruence of the call data with other data
partitions is consistent with the idea that the advertisement calls of
this group of frogs are under strong sexual selection.
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