Principal Coordinate Analyses (PCoA) of the microbiota. The samples are color-coded by type: blue squares, P. schultei anterior midgut (Ps_AMG) samples; green circles, R. artemis anterior midgut (Ra_AMG) samples; red triangles, R. artemis posterior midgut (Ra_PMG) samples. The label indicates the individual id within each species. The numbers in parentheses in axis labels indicate the percentage of variance explained. (A) All 5,679 bacterial 16S rDNA reads. (B) Excluding Spiroplasma reads.