Table 4.

Divergence times for nodes/clades in the Ephemeroptera based on the mt genome. All the estimates are represented in millions of years ago (Mya). “&” represents the relationship between two branches.

Nodes/Clades	Mean Divergence Time (Mya)	95% HPD Range (Mya)
Ephemeridae & Polymitarcyidae	81.81	33.19~142.93
(Ephemeridae + Polymitarcyidae) & Potamanthidae	105.04	43.32~164.57
Vietnamellidae & Ephemerellidae	98.50	98.00~99.00
Teloganodidae & Baetidae	111.46	84.47~142.94
(Teloganodidae + Baetidae) & Caenidae	128.91	102.11~162.40
(Teloganodidae + (Baetidae + Caenidae)) & Leptophlebiinae	141.23	115.39~174.06
((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) & (Vietnamellidae + Ephemerellidae)	150.73	126.64~183.03
(((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) + (Vietnamellidae + Ephemerellidae)) & ((Ephemeridae + Polymitarcyidae) + Potamanthidae)	161.50	139.21~193.76
((((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) + (Vietnamellidae + Ephemerellidae)) + ((Ephemeridae + Polymitarcyidae) + Potamanthidae)) & Heptageniidae	173.64	155.70~206.74
Siphlonuridae & Ameletidae	159.99	159.00~161.00
(((((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) + (Vietnamellidae + Ephemerellidae)) + ((Ephemeridae + Polymitarcyidae) + Potamanthidae)) + Heptageniidae) & (Siphlonuridae + Ameletidae)	179.27	163.65~213.04
((((((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) + (Vietnamellidae + Ephemerellidae)) + ((Ephemeridae + Polymitarcyidae) + Potamanthidae)) + Heptageniidae) + (Siphlonuridae + Ameletidae)) & Isonychiidae	187.82	168.38~223.63
(((((((Teloganodidae + (Baetidae + Caenidae)) + Leptophlebiinae) + (Vietnamellidae + Ephemerellidae)) + ((Ephemeridae + Polymitarcyidae) + Potamanthidae)) + Heptageniidae) + (Siphlonuridae + Ameletidae)) + Isonychiidae) & Siphluriscidae	196.91	171.18~236.55