Table 1 Morphometrics of the infective juvenile (IJ) and adult generations of Heterorhabditis casmirica n. sp. (population HM)

n

1

20

20

20

20

Body length (L)

875.5

754 ± 80 (608–914)

3466 ± 392 (2851–4219)

1432 ± 172 (1273–1990)

563 ± 22 (512–599)

a (L/BD)

18.3

18 ± 2.8 (15–24)

24 ± 3.2 (19–27)

20 ± 1.9 (14–25)

23 ± 1.1 (20–25)

b (L/NL)

7.6

7.3 ± 0.4 (6.4–8.2)

24 ± 4.6 (16–39)

11 ± 0.8 (10–13)

4.5 ± 0.2 (4.0–5.2)

c (L/T)

30.5

29 ± 3.8 (24–35)

72 ± 32 (56–84)

19 ± 3.2 (16–31)

5.4 ± 0.5 (4.7–6.4)

c′ (T/ABD)

1.3

1.2 ± 0.2 (1.1–1.6)

1.8 ± 0.2 (1.4–2.2)

1.9 ± 0.1 (1.6–2.5)

6.0 ± 0.7 (5.1–8.0)

V% (VA/L × 100)

–^a

–

52 ± 2.7 (46–57)

49 ± 2.1 (45–52)

–

Maximum body diameter (BD)

46.2

36 ± 7.4 (24–48)

230 ± 50 (140–341)

91 ± 17 (70–135)

20 ± 1.0 (17–24)

Excretory pore—anterior end (EP)

83.9

114 ± 4.3 (102–120)

194 ± 8.5 (180–211)

146 ± 7.5 (135–157)

106 ± 6 (98–129)

Width at excretory pore (WEP)

27.8

24 ± 3.2 (19–29)

93 ± 12.2 (71–108)

49 ± 5.6 (41–61)

18 ± 1.3 (14–24)

Nerve ring—anterior end (NR)

60.3

72 ± 6.1 (58–80)

86 ± 9.1 (77–100)

95 ± 6.3 (84–111)

89 ± 4.3 (79–94)

Pharynx length (PL)

98.5

108 ± 7.8 (96–114)

186 ± 9.0 (168–202)

137 ± 7.6 (126–149)

116 ± 5.1 (99–127)

Neck length (NL)

111.7

112 ± 8.2 (100–118)

191 ± 9.5 (174–207)

141 ± 8.3 (132–156)

119 ± 5.4 (104–132)

Bulb length (BL)

16.9

18 ± 2.2 (14–23)

34 ± 2.8 (28–40)

28 ± 2.2 (25–33)

15 ± 1.3 (12–19)

Bulb width (BW)

13.7

12 ± 1.3 (10–15)

26 ± 1.4 (22–30)

20 ± 1.6 (18–23)

8.5 ± 1.6 (6.7–13)

Tail length (T)

28.6

25 ± 4.5 (16–32)

82 ± 12 (72–114)

75 ± 5.9 (64–83)

99 ± 7.8 (85–115)

Anal body diameter (ABD)

22.5

18 ± 3.1 (14–25)

44 ± 4.4 (36–56)

26 ± 2.0 (22–30)

15 ± 1.7 (11–20)

Spicule length (SL)

43.5

41 ± 2.9 (38–48)

–

–

–

Gubernaculum length (GL)

23.8

22 ± 2.0 (18–26)

–

–

–

D% (EP/NL × 100)

96.4

102 ± 2.3 (99–107)

102 ± 4.8 (94–120)

103 ± 4.0 (99–116)

90 ± 3.8 (83–97)

E% (EP/T × 100)

295.3

325 ± 31 (268–394)

236 ± 23 (205–292)

177 ± 15 (156–209)

115 ± 9.1 (93–125)

SW% (SL/ABD × 100)

193.2

212 ± 27 (160–252)

–

–

–

GS% (GL/SL × 100)

54.6

53 ± 4.3 (45–63)

–

–

–

Body width at vulva

–

–

182 ± 17 (152–218)

90 ± 17 (70–132)

–

Vulva—anterior end (VA)

–

–

1545 ± 152 (1312–1883)

708 ± 80 (631–918)

–

Vulva—posterior end (VP)

–

–

1918 ± 182 (1466–2429)

726 107 (617–1076)

–