One nutritional symbiosis begat another: Phylogenetic evidence that the ant tribe Camponotini acquired Blochmanniaby tending sap-feeding insects

Table 4 Results of the Shimodaira-Hasegawa (SH) test indicate the data cannot reject any of the 15 alternative rooted Blochmannia phylogenies.

Constraint tree¹	Root Position²	-ln L	Diff -ln L	p-value³
A	Camp+Cal+Echin	9895.98	3.63	0.86
A	Colob	9892.35	(best)
A	Mid	9900.48	8.14	0.80
A	Opis	9899.04	6.69	0.82
A	Poly	9899.24	6.90	0.84
B	Camp+Cal+Echin	9895.73	3.38	0.88
B	Colob	9896.81	4.46	0.85
B	Mid	9894.59	2.24	0.97
B	Opis	9895.78	3.44	0.95
B	Poly	9893.82	1.47	0.90
C	Camp+Cal+Echin	9895.18	2.84	0.91
C	Colob	9894.88	2.53	0.94
C	Mid	9896.98	4.64	0.88
C	Opis	9906.04	13.69	0.66
C	Poly	9898.01	5.66	0.81

¹Each of the three unrooted trees (A-C, see Figure 4) has five possible root positions, for 15 possible rooted trees.
²The root position indicates the lineage to which outgroup taxa (mealybug endosymbionts) were attached, with "mid" indicating the internal branch.
³Non-significant results indicate that the likelihood score does not differ significantly from that of the "best" tree (topology A-Colob).

ISSN: 2730-7182