Table 1.

Host Ranges and Measures of Reticulate Evolution (δ Values) for Rickettsia Species Calculated with δ Plots

Species/Host Range	δ GC	δ GD	δ GR
R. akari/narrow	0.082795479	0.378926211	0.033333333
R. australis/narrow	0.079534821	0.251495143	0.03333333
R. Canadensis CA/narrow	0.076828036	0.258589468	0.004166667
R. Canadensis McK/narrow	0.068624935	0.229864215	0.004166667
R. conorii/narrow	0.112250287	0.200588468	0.004166667
R. heilongjiangensis/narrow	0.121680988	0.196572867	0.004166667
R. massiliae AZT/narrow	0.138092916	0.177975839	0.004166667
R. massiliae MTU/narrow	0.119862616	0.358807859	0.004166667
R. montanensis/narrow	0.151071384	0.243803947	0.033333333
R. parkeri/narrow	0.152924254	0.292575292	0.004166667
R. philipii/narrow	0.15223778	0.200265796	0.004166667
R. prowazekii MAD/narrow	0.074950853	0.240241396	0.004166667
R. prowazekii Rp22/narrow	0.074607341	0.230598852	0.004166667
R. slovaca 13Bnarrow	0.106402799	0.19013078	0.004166667
R. slovaca DCnarrow	0.104094587	0.19013078	0.004166667
Average	0.107730605	0.242704461	0.012121212
R. africae/wide	0.201992224	0.29655889	0.101165072
R. bellii OSU/wide	0.113363604	0.234665676	0.162406932
R. bellii RML/wide	0.113974112	0.242176629	0.162406932
R. felis/wide	0.116700877	0.339836324	0.137385287
R. japonica/wide	0.251233383	0.329896265	0.089570374
R. peacockii/wide	0.316822239	0.401119108	0.135014642
R. rhipicephali/wide	0.231303473	0.383681072	0.119843847
R. rickettsii/wide	0.188528525	0.316222358	0.180385488
R. typhi/wide	0.131857171	0.3710849	0.089570374
Average	0.185086179	0.323915691	0.126917752
Test significance	*	*	**

Note.—Values in italic were not used to calculate GR mean values nor for statistical test but were kept in the PCA plot. All tests were two-tailed and P values <0.05 were considered significant.

*P < 0.01, **P < 0.001.