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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Complex coevolutionary history of symbiotic Bacteroidales bacteria of various protists in the gut of termites

Figure 2

Phylogenetic relationships of Bacteroidales symbionts of gut protests. The sequences identified from the symbionts of gut protists are shown in bold letters. Their morphological types and names of their host protist genera are shown after the names of the sequences. Abbreviations of the morphological types examined by FISH or predicted by previous electron microscopy are R, rod-shaped ectosymbionts; F, filamentous ectosymbionts; B, bristle-like ectosymbionts; and IR, intracellular rods (endosymbiotic). The host genera belonging to Cristamonadida, Trichonymphida, and Oxymonadida are shown in green, red, and blue, respectively. Vertical black bars indicate previously described clusters of termite-gut Bacteroidales members (clusters IV and V) [19]. Nodes supported by both an ML-bootstrap value of > 70% and a Bayesian posterior probability of > 95% are indicated by filled circles. Those of > 50% supported by either ML-bootstrap or Bayesian analysis are represented by open circles. Reference sequences tagged Rs, Rsa, and RPK were identified from whole gut communities of Reticulitermes termites, whereas those tagged Nt, M2, Mg, Tc, COB, and BCf were identified from the termite genera Nasutitermes, Microcerotermes, Macrotermes, Termes, Cubitermes, and Coptotermes, respectively. Reference sequences tagged Pe were identified from the gut community of a scarab beetle of the genus Pachnoda. Scale bar represents 0.1 nucleotide substitutions per position.

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