Table 3 Morphometric measurements of Macrostomum schareri and Macrostomum gracilistylum

Body L

918.4

152.5

633.8–1169.3

17

1083.0

131.4

801.9–1264.5

9

Body W

305.2

51.4

219.5–434.2

13

330.6

105.2

211.3–504.0

8

Eye ø

20.5

5.5

15.2–33.4

8

14.4

1.6

12.2–16.8

7

Testis L

158.1

23.8

137.1–221.9

11

166.5

27.6

114.1–193.3

7

Ovary L

99.3

18.0

75.7–142.9

11

88.9

20.5

61.4–115.8

7

Short sensory cilia L

12.8

3.9

8.2–22.4

13

10.2

2.2

5.6–12.5

8

Long sensory cilia L

20.8

5.0

11.6–28.1

8

23.4

5.1

18.4–33.1

8

Rhabdite L

6.7

1.6

5.3–9.4

5

10.1

1.2

9.1–11.9

4

Stylet traits

 Straight L

109.2

14.3

72–120.9

11

190.7

8.9

181.2–203.6

5

 Segmented L

116.0

14.4

78.4–128.0

11

201.2

12.3

187.1–216.1

5

 Proximal opening W

19.5

4.0

9.8–24.6

10

12.2

1.8

10.8–14.9

5

 Distal opening W

3.0

0.9

2.1–5.2

11

1.8

0.2

1.4–2.1

5

Sperm traits

 Total L

168.4

10.0

159.2–179.0

4

70.6

1.9

67.9–72.4

4

 Anterior L

121.4

7.6

114.3–129.0

4

52.0

1.4

50.6–53.5

4

 Bristle L

3.8

1.0

2.8–5.1

4

5.3

1.0

4.3–6.7

4

 Brush L

3.3

0.3

3.0–3.6

4

2.7

0.6

1.9–3.1

4