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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