Table 3 Comparative metrical data (in μm) for live and fixed cercariae of Echinostoma sp. IG and E. revolutum from natural infections in Radix spp. and Stagnicola palustris in Germany and Iceland

Body length

260 - 362

228 - 292

254

303 - 427

159 - 234

188

Body width (max.)

184 - 249

90 - 97

94

193 - 251

107 - 125

112

Oral sucker length

45 - 63

36 - 46

42

56 - 71

38 - 52

45

Oral sucker width

50 - 66

37 - 45

42

53 - 68

37 - 49

42

Ventral sucker length

54 - 72

43 - 54

48

63 - 83

47 - 66

55

Ventral sucker width

57 - 81

44 - 47

46

58 - 83

48 - 60

54

Pharynx length

25 - 29

16 - 25

20

27 - 36

20 - 24

21

Pharynx width

22 - 26

12 - 19

15

25 - 29

13 - 14

13

Oesophagus length

56 - 89

61 - 96

78

54 - 103

30 - 55

40

Tail length

334 - 353

296 - 378

344

364 - 417

316 - 405

367

Tail width (at base)

44 - 49

30 - 34

32

39 - 52

20 - 36

27

Tail-tip length

67 - 83

-

-

35 - 93

-

-

Proximal dorsal fin-fold length

49 - 63

50

-

41 - 153

-

-

Proximal dorsal fin-fold width

14 - 15

-

-

5 - 13

8 - 11

9

Distal dorsal fin-fold length

147 - 212

106 - 154

120

72 - 159

-

-

Distal dorsal fin-fold width

30 - 35

14 - 21

16

7 - 16

-

-

Proximal ventral fin-fold length

47 - 90

73

-

51 - 116

85

-

Proximal ventral fin-fold width

12 - 15

-

-

4 - 6

5

-

Distal ventral fin-fold length

44 - 64

41

-

74 - 202

99 - 157

125

Distal ventral fin-fold length

6 - 18

8

-

7 - 14

-

-