Remarks: Cercariae with four penetration gland-cells (two anterior and two lateral to the ventral sucker), 20
flame cells and absent eyespots have been described in the genus Hysteromorpha Lutz, 1931.
In our series, we found that the cytologic features that appeared to be useful in distinguishing SPHTN from PTC included
flame cell change, watery or inspissated colloid, short nonbranching papillae, and lack of intranuclear cytoplasmic inclusions.
limuli Body Length 0.36-0.7 0.26-0.40 Body Width 0.22-0.36 0.15-0.20 Acetabulum 0.048-0.065 0.029-0.35 Oral sucker 0.05-0.065 0.035-0.045 Pharynx 0.02-0.03 0.017-0.21 Oesophagus Long, longer than caeca 0.1-0.13 Ovary 0.10-0.16 x 0.06-0.09 0.06-0.065 x 0.036-0.045 Egg 0.022-0.27 x 0.011-0.012 0.016-0.02 x 0.009-0.011 Testes 0.10-0.16 x 0.06-0.09 Lateral, 0.05-0.065 Male papilla 0.038-0.058 0.06-0.0075
Flame cell 2{(2 + 2) + (2 + 2)} 2{(2 + 2) + (2 + 2)} formula Exptl.definitive Gulls Mice & Hamsters host First Int.