Table 1

Tests of significance for competing hypotheses. Statistical tests of significance were conducted for different competing phylogenetic hypotheses within Pancrustacea and within arthropod classes. au, approximately unbiased test; kh, Kishino-Hasegawa test; sh, Shimodaira-Hasegawa test (26).

Tree−ln L (ProtML)aukhsh
(Collembola, (Crustacea, Insecta))19723.730.9910.9790.979Best
(Crustacea, (Collembola, Insecta))19744.960.0090.0210.021
(Myriapoda, (Chelicerata, Pancrustacea))19723.730.5090.4960.649Best
((Myriapoda, Chelicerata), Pancrustacea)19723.970.5090.5040.626
(Chelicerata, (Myriapoda, Pancrustacea))19739.900.0060.0320.084