Table 2 Nucleotide composition and skewness of different elements of the mitochondrial genomes of Digramma interrupta and Ligula intestinalis

PCGs

10,062/10,062

45.6/45.1

12.3/13.1

21.9/21.5

20.2/20.3

67.5/66.6

32.5/33.4

-0.351/-0.354

0.244/0.216

1st codon position

3354/3354

41.2/41.4

11.2/11.3

23.6/23.4

24.0/23.9

64.8/64.8

35.2/35.2

-0.272/-0.277

0.366/0.358

2nd codon position

3354/3354

47.6/47.3

15.1/15.4

17.6/17.5

19.7/19.7

65.2/64.8

34.8/35.1

-0.461/-0.461

0.132/0.122

3rd codon position

3354/3354

47.9/46.5

10.6/12.6

24.5/23.6

17.0/17.4

72.4/70.1

27.6/30.0

-0.323/-0.327

0.231/0.159

atp6

510/510

47.6/47.3

13.3/13.3

21.6/20.2

17.5/19.2

69.2/67.5

30.8/32.5

-0.377/-0.401

0.134/0.181

cox1

1566/1566

45.0/44.0

12.6/13.8

22.3/21.8

20.1/20.4

67.3/65.8

32.7/34.2

-0.336/-0.338

0.229/0.194

cox2

570/570

40.2/38.9

12.8/14.2

23.9/24.7

23.2/22.1

64.1/63.6

36.0/36.3

-0.255/-0.223

0.288/0.217

cox3

643/643

46.8/47.1

12.4/12.4

20.5/19.4

20.2/21.0

67.3/66.5

32.6/33.4

-0.390/-0.416

0.238/0.256

cytb

1107/1107

43.8/43.9

13.7/14.1

22.1/21.6

20.3/20.4

65.9/65.5

34.0/34.5

-0.329/-0.341

0.194/0.183

nad1

891/891

45.3/44.9

11.0/11.4

20.4/21.1

23.2/22.6

65.7/66.0

34.2/34.0

-0.379/-0.361

0.357/0.327

nad2

879/879

48.9/48.9

10.5/11.1

21.0/19.8

19.6/20.1

69.9/68.7

30.1/31.2

-0.398/-0.424

0.303/0.287

nad3

357/357

51.3/49.9

7.8/9.2

21.8/20.7

19.0/20.2

73.1/70.6

26.8/29.4

-0.402/-0.413

0.417/0.371

nad4

1251/1251

47.2/46.9

13.7/14.2

19.4/19.0

19.6/19.8

66.6/65.9

33.3/34.0

-0.417/-0.423

0.175/0.164

nad4L

261/261

48.3/49.4

9.2/8.8

27.2/27.2

15.3/14.6

75.5/76.6

24.5/23.4

-0.279/-0.290

0.250/0.246

nad5

1569/1569

42.4/41.4

13.3/15.2

23.8/23.6

20.5/19.8

66.2/65.0

33.8/35.0

-0.281/-0.273

0.214/0.133

nad6

459/459

48.8/48.1

9.8/10.2

21.1/21.1

20.3/20.5

69.9/69.2

30.1/30.7

-0.396/-0.390

0.348/0.333

rrnL

967/967

40.1/39.7

12.0/12.2

28.3/28.2

19.5/19.9

68.4/67.9

31.5/32.1

-0.172/-0.169

0.239/0.239

rrnS

742/743

38.0/38.2

12.1/12.9

30.2/29.3

19.7/19.5

68.2/67.5

31.8/32.4

-0.115/-0.131

0.237/0.203

NCR1

223/224

44.4/41.5

8.5/10.3

34.5/33.5

12.6/14.7

78.9/75.0

21.1/25.0

-0.125/-0.107

0.191/0.179

NCR2

249/183

51.8/50.3

7.6/6.6

22.1/24.6

18.5/18.6

73.9/74.9

26.1/25.2

-0.402/-0.343

0.415/0.478

tRNAs

1410/1410

38.5/37.9

12.4/13.0

29.1/28.6

20.0/20.4

67.6/66.5

32.4/33.4

-0.140/-0.141

0.234/0.220

Full genome

13,685/13,621

44.1/43.6

12.1/12.9

23.8/23.4

20.0/20.2

67.9/67.0

32.1/33.1

-0.299/-0.301

0.245/0.221