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Table 6.

A comparative characteristic of the morphology of cercariae D. loossi, D. anatinarum and D. pulverulenta (sizes in mm).

Trait – Cercaria D. loossi (our data) D. anatinarum (by Leite et al., 1982) D. pulverulenta (by Khalifa, 1976)
Body length 0.220–0.246 0.169–0.207 0.174–0.243
Body width 0.063–0.078 0.09–0.016
Tail length 0.260–0.370 0.180–0.219 0.225–0.371
Furca length 0.126–0.146 0.53–0.74 0.118–0.266
Anterior organ 0.070–0.082 × 0.046–0.052 0.058–0.080 × 0.037–0.049 0.085–0.089 × 0.052–0.055
Ventral sucker 0.032–0.034 × 0.028–0.030 0.019–0.027 × 0.021–0.030 0.034 × 0.027
Cuticular arming available available available
Formula of excretory system 2[(1 + 1+1) + (3 + 1)] = 14 2[(1 + 1+1) + (2 + 1)] = 12 2[(1 + 1+1) + (3 + 1)] = 14
N of penetration glands 5 pairs 5 pairs 5 pairs
Eyes 2 2 2
Intermediate hosts (Planorbidae) Anisus spirorbis Biomphalaria straminea Planorbis planorbis Anisus spirorbis

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