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Table 2 Morphometrics of Oncholaimus scanicus from the site Menez Gwen

From: Free-living nematode species (Nematoda) dwelling in hydrothermal sites of the North Mid-Atlantic Ridge

Character

Males

Females

n

Min–max

Mean

SD

CV

n

Min–max

Mean

SD

CV

L

27

6945–11,390

9544

1023

10.7

29

7690–11,230

9270

905

9.77

a

24

69.5–113

90

10.9

12.2

24

58.9–97.6

70.3

8.83

12.6

b

27

7.89–13.6

10.6

1.08

10.2

29

8.65–12.1

10.1

0.9

8.93

c

27

45.4–68.7

55.7

6.82

12.2

27

38.5–53.5

46.6

4.13

8.86

c′

26

2.64–4.24

3.27

0.34

10.4

25

3.0–0–4.25

3.39

0.32

9.44

V %

–

–

–

–

–

29

65.1–77.5

69.1

2.45

3.55

Body diameter at level of cephalic setae

26

43–53

47.5

2.09

4.4

29

43–55

48.4

2.36

4.88

Body diameter at level of nerve ring

22

68–99

82.1

6.98

8.51

30

73–107

85.5

8.26

9.67

Body diameter at level of cardia

21

77–128

100

14.9

14.9

26

91–144

107

14.4

13.5

Midbody diameter

24

80–151

106

16.9

15.8

25

99–176

134

21.8

16.3

Anal body diameter

26

45–60

52.8

3.57

6.76

26

45–68

59.5

5.23

8.79

Length of outer labial setae

10

9.2–12.9

10.9

1.15

10.5

9

10.4–13

   

Width of amphideal fovea

5

10.7–12.7

11.8

0.79

6.68

5

11–13.8

12.0

1.09

9.07

Width of amphideal fovea as percentage of c.b.d.,  %

4

21.8–27.0

24.0

2.19

9.11

5

21.7–26.4

23.3

1.85

7.95

Total stoma length measured along ventral rhabdion

12

45–53

49.4

2.09

4.23

18

44.5–52

48.7

2.07

4.25

Maximal stoma width

12

28–33

30.7

1.91

6.22

18

28–37.3

31.6

3.13

9.92

Length of dorsal onch from tip to posterior end of rhabdion

8

27–30.5

28.6

1.39

4.85

11

25.3–31

28.1

1.96

6.99

Length of left subventral onch from tip to posterior end of rhabdion

8

32–39.6

36.3

2.82

7.76

11

32.9–37.9

35.4

1.69

4.78

Length of right subventral onch from tip to posterior end of rhabdion

8

24.6–34.5

29.6

3.08

10.4

11

21.9–33

27

3.02

11.2

Distance from cephalic apex to ventral pore

24

135–211

174

20.6

11.9

24

139–226

183

21.6

118

Spicule’s length along arch

24

81–102

91.5

5.06

5.53

–

–

–

–

–

  1. Measures in µm except for ratios