Table 1 Morphometric characteristics of cercariae and metacercariae of  Renylaima capensis 
Larval stage | Cercariae | Metacercariae | ||||
|---|---|---|---|---|---|---|
Intermediate slug host species | Ariostralis nebulosa | Ariopelta capensis | ||||
No. larvae studied | n = 10 | n = 10 | ||||
| Â | E.V. | X | SD | E.V. | X | SD |
Length | 330.0-436.6 | 392.9 | 40.4 | 528.5-694.4 | 604.6 | 52.1 |
Maximum width | 114.9-166.3 | 142.0 | 18.6 | 139.0-206.8 | 176.7 | 20.0 |
Oral sucker (OS) | 68.9-85.9/62.9-80.4 | 76.5/67.5 | 6.4/5.7 | 82.6-108.4/76.9-103.4 | 92.4/87.7 | 9.3/8.0 |
Ventral sucker (VS) | 80.4-94.9/68.9-85.9 | 86.5/78.1 | 6.3/5.2 | 96.9-131.3/91.2-119.9 | 115.7/106.5 | 13.0/12.6 |
Sucker ratio (OS/VS) | 0.62-0.85 | 0.73 | 0.07 | 0.57-0.83 | 0.68 | 0.08 |
Prepharynx (length) | 0.0-12.2 | 5.4 | 5.5 | 0.0-37.0 | 16.3 | 11.4 |
Pharynx (length/width) | 34.4-39.9/26.4-34.4 | 36.6/32.3 | 2.7/3.2 | 39.9-57.4/31.3-45.9 | 45.0/38.6 | 5.4/4.3 |
Anterior testis (T1) | 22.0-28.6/34.0-34.8 | 33.5/26.8 | 2.1/5.6 | 25.6-57.0/18.0-37.0 | 40.3/29.6 | 10.7/6.5 |
Posterior testis (T2) | 22.9-34.4/20.0-28.6 | 28.9/23.9 | 4.6/3.0 | 34.2-48.4/22.8-37.0 | 39.5/30.0 | 5.0/4.9 |
Ovary | 22.0-28.6/17.0-22.9 | 25.2/20.4 | 2.9/2.7 | 25.6-31.3/19.9-25.6 | 28.9/23.2 | 2.1/2.1 |
Distance OS-VS | 85.9-137.8 | 112.3 | 21.2 | 126.3-245.1 | 177.1 | 35.0 |
Distance VS-T1 | 17.5-40.0 | 28.6 | 8.0 | 37.0-71.2 | 53.8 | 13.3 |
Tail (length/width) | 22.9-35.4/25.9-28.4 | 30.9/26.9 | 6.9/1.3 | 28.5-37.0/27.1-37.0 | 33.1/30.8 | 2.7/3.4 |