Table 2 Measurements (in micrometres) of third stage larvae of Crenosoma vulpis recovered from Cornu aspersum at selected days post-infection (dpi)

Specimens studied

n = 1

n = 2

n = 3

n = 10

Body length

429

393–419

383–459 (441)

403–509 (466)

Maximum body width

16

21–22

20–22 (21)

19–23 (20)

Tail length

29

26–28

29–37 (32)

30–41 (36)

Anal body width

10

9–11

12–14 (13)

12–16 (15)

Oesophagus length

147

151–155

133–153 (134)

138–164 (152)

Oesophagus width at level of bulb

11

12–13

12–15 (13)

12–18 (14)

Genital primordium, distance from anterior extremity

268

242–259

228–293 (255)

260–303 (273)

Nerve-ring, distance from anterior extremity

70

67–70

65–67 (66)

62–88 (73)

Excretory pore, distance from anterior extremity

79

74–79

74–82 (75)

72–99 (85)

Ratio oesophagus length to body length

0.343

0.370–0.384

0.302–0.366 (0.333)

0.310–392 (0.342)

Ratio distance from anterior extremity to genital primordium to body length

0.625

0.616–0.618

0.578–0.638 (0.595)

0.575–0.639 (0.591)