Fig 1.
A Crematogaster (Decacrema) borneensis colony nest inside a Macaranga bancana stem (photo by T. Komatsu).
Fig 2.
Admixture proportions based on STRUCTURE clustering of five microsatellite loci.
Analysis of 98 samples (bars) of Decacrema ants inhabiting Macaranga in Lambir Hills National Park yielded six genetic clusters (MS1–MS6), which are color coded here for K = 3, 5, and 6. Triangles indicate samples that appear to be admixtures of two genetic clusters, suggesting hybridization.
Fig 3.
Comparison between the mtDNA phylogeny (A) and nrDNA SSR genotyping (B).
The maximum likelihood (ML) phylogeny of 98 samples of Decacrema ants inhabiting Macaranga in Lambir Hills National Park was inferred from a 569-bp DNA sequence of the mitochondrial gene cytochrome oxidase I. The numbers above the branches are the ML bootstrap support/Bayesian posterior probability ratio, and those below the branches indicate the maximum parsimony (MP) bootstrap support. An asterisk (*) replaces one node bootstrap support value because the node was not recovered in the MP bootstrap analysis. The same individuals that were used for the mtDNA phylogeny were genotyped for the five microsatellite loci. The admixture level of each genotype in individual samples is indicated by the color intensity as shown at the bottom of (B).
Table 1.
Results of χ2 tests of the specificity of ant genotypes toward Macaranga groups/species.