FIG. 1.

Phylogenetic trees of squid host species and their symbiotic bacterial isolates. Each tree was inferred by comparison of the unambiguously aligned positions of either the ITS, the COI, or the gapA sequence. Identical branching patterns were obtained for each locus when analyzed by either the parsimony (30) or maximum-likelihood (24) method. The values given at each node are the percentages of 100 bootstrap resamplings and subsequent heuristic searches that support the relationships between the clades.