Table 2. Comparison of the mitochondrial protein coding genes and RNA genes of the freshwater jellyfish C. sowerbyi (C.s), the jellyfish A. aurita (A.a), the hydrozoan H. oligactis (H.o), cubozoan A. moseri (A.m), and the trachyline C. aphrodite (C.a).

Genes	Number of encoded nucleotidesa					Percent sequence identity
	C.s	A.a	H.o	A.m	C.a	C.s/A.a	C.s/H.o	C.s/A.m	C.s/C.a
Atp6	705	705	702	711	702	69%	46%	53%	80%
Atp8	207	204	207	198	204	30%	21%	33%	56%
Cob	1185	1140	1140	1146	1143	68%	67%	71%	83%
Cox1	1566	1581	1575	1566	1563	82%	78%	82%	92%
Cox2	738	726	756	732	738	65%	57%	68%	84%
Cox3	786	786	786	783	783	76%	58%	78%	87%
Nad1	999	972	990	960	993	65%	62%	62%	80%
Nad2	1350	1320	1305	1338	1350	34%	30%	32%	50%
Nad3	357	360	348	339	354	67%	59%	54%	72%
Nad4	1461	1443	1458	1443	1458	55%	55%	46%	73%
Nad4L	309	303	300	282	297	57%	56%	57%	80%
Nad5	1833	1818	1833	1821	1830	51%	52%	49%	70%
Nad6	564	573	558	543	561	38%	37%	34%	64%
rns	995	960	977	893	994	63%	68%	57%	76%
rnl	1817	1817	1745	1679	1761	36%	39%	36%	72%
Trn-M	71	70	71	70	71	45%	68%	64%	93%
Trn-W	71	71	70	nd	71	45%	75%	nd	88%

“nd” means not determined.

^aData for A. aurita are from Shao et al. [10], for H. oligactis are from Kayal and Lavrov [8], for A. moseri are from Kayal et al. [7], for C. aphrodite are from Kayal et al. [7].