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Table 7.

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

Trait D. loossi (our data) D. anatinarum (by Leite et al., 1982) D. pulverulenta (by Khalifa, 1976) D. asiatica (by Chauhan et al., 1973)
Body length 9.5–12.5 6.2 3.25–8.83 Male not described
Body width 1.35–1.86 0.60–0.75 0.40–1.79
N of testicles 138–148 120–130 90–110
Seminal vesicle Strombuliform Bulbus-like Strombuliform
Body length 10.5–13.6 8.0 3.35–10.3 6.0
Body width 1.32–1.38 0.89–1.01 0.45–1.65 1.3
Ovary Strombuliform Elongated, tubular Strombuliform Long, convolute
Uterus Tubiform Long with tortuous knots Compact, roundish Large, coiled

Number of eggs in uterus One Numerous Numerous Numerous

Shape of eggs Oval with on spine on one pole Roundish, without spines Oval with spine on one pole Oval with spine on one pole

Definitive hosts Anas platyrhynchos dom. Anas platyrhynchos Querquedula querquedula Anas crecca
Pelecanus onocrotalus Cairina moschata dom. Anas boschas
Fulica atra
Anas platyrhynchos

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