Table 2 Comparative morphometrics of all generations of present strain CS38 with Steinernema abbasi. All measurements are in micrometers (except percentage) and in the form of mean (range)

Total body length (L)

1270 (1082–1441)

1252 (999–1534)

883 (761–1006)

861 (606–1035)

5041 (3731–6314)

3510 (2453–4477)

1631 (1287–2071)

2609 (1897–3917)

581 (520–610)

541 (496–579)

Greatest body width (GBW)

135 (101–156)

87 (82–98)

60 (54–73)

70 (64–80)

205 (169–239)

159 (143–181)

95 (69–130)

130 (123–148)

26 (22–30)

29 (27–30)

Excretory pore (EP)

72 (57–83)

80 (68–89)

62 (54–68)

66 (62–79)

80 (70–96)

71 (62–79)

55 (46–60)

66 (61–73)

46 (39–53)

48 (46–51)

Nerve ring (NR)

91 (81–114)

103 (99–123)

72 (63–85)

99 (93–106)

102 (92–127)

125 (120–137)

75 (71–81)

114 (110–118)

57 (42–67)

68 (64–72)

Pharynx length (ES)

138 (121–162)

133 (121–144)

118 (107–126)

121 (112–130)

169 (159–190)

165 (155–176)

134 (125–140)

146 (136–157)

88 (69–98)

89 (85–92)

Tail

22 (16–27)

26 (20–31)

18 (15–20)

21 (17–24)

47 (29–72)

37 (31–40)

44 (26–56)

36 (32–39)

55 (42–63)

56 (52–61)

Spicule length (SPL)

72 (62–80)

65 (57–74)

53 (33–63)

61 (51–69)

-

-

-

-

-

Gubernaculum length (GL)

46 (42–50)

45 (33–50)

37 (30–40)

43 (35–48)

-

-

-

-

-

a

9.5 (7.5–11)

-

15 (12–17)

-

25 (17–37)

-

17 (15–19)

-

23 (20–25)

18 (17–20)

b

9.2 (8.1–11)

-

7.5 (6.2–8.6)

-

30 (22–37)

-

12 (10–16)

-

6.7 (6.0–7.5)

6.0 (5.5–6.6)

c

58 (46–83)

-

50 (43–54)

-

113 (55–173)

-

38 (27–50)

-

11 (9.2–13.6)

9.8 (8.1–10)

D%

52 (44–60)

60 (51–68)

53 (48–56)

56 (50–70)

47 (42–55)

42 (36–48)

41 (34–46)

45 (43–47)

53 (45–58)

53 (51–58)

E%

325 (248–403)

-

350 (294–438)

-

180 (97–237)

-

129 (89–201)

-

85 (70–102)

-

SW%

210 (159–245)

156 (107–187)

191 (114–220)

159 (128–185)

-

-

-

-

-

GS%

65 (58–80)

70 (58–85)

70 (57–91)

70 (58–81)

-

-

-

-

-