Table 2 Detailed information of unassigned regions of Arcidae mitogenomes. The unit of length is the bp

Scapharca broughtonii (1)

44,333

28,908

65.21%

18,057–27,994

9938

22.42%

1–8614 36,903–44,333

16,045

36.19%

Scapharca broughtonii (2)

44,327

28,844

65.07%

17,914–27,851

9938

22.42%

1–8471 36,760–44,327

16,039

36.18%

Scapharca broughtonii (3)

46,191

30,806

66.69%

18,033–27,968

9936

21.51%

1–8590 36,753–46,191

18,029

39.03%

Scapharca broughtonii (4)

48,560

32,984

67.92%

25,845–35,677

9833

20.25%

1–16,532 44,063–48,560

21,030

43.31%

Scapharca broughtonii (5)

48,161

33,004

68.53%

9314–19,144

9831

20.41%

27,798–48,161

20,364

42.28%

Scapharca broughtonii (6)

46,985

31,809

67.70%

9314–19,146

9833

20.93%

27,673–46,985

19,313

41.11%

Scapharca kagoshimensis (1)

54,157

38,394

70.89%

38,928–48,778

9851

25.66%

2805–29,551

26,747

69.67%

Scapharca kagoshimensis (2)

56,170

41,101

73.17%

30,713–40,833

10,120

18.02%

1–21,329 49,169–56,170

28,331

50.44%

Scapharca kagoshimensis (3)

46,713

32,982

70.61%

9395–19,345

9951

21.30%

28,023–46,713

18,691

40.01%

Scapharca cornea

46,362

30,708

66.24%

22,735–36,777

14,034

30.27%

1–13,571 44,767–46,362

15,167

32.71%

Scapharca gubernaculum

45,697

30,079

65.82%

9164–21,106

11,943

26.14%

29,095–45,697

16,603

36.33%

Scapharca globosa

33,405

18,631

55.77%

14,724–17,921

3198

9.57%

1–4372 26,555–33,405

11,223

33.60%

Anadara crebricostata

36,671

21,991

59.97%

23,496–27,840

4345

11.85%

1–5933 36,253–36,671

6352

17.32%

Anadara vellicata

34,147

20,659

60.50%

9130–9424

295

0.86%

18,084–34,147

16,064

47.04%