The upcoming discussion will update you about the difference between pseudophyllidean cestodes and cyclophyllidean cestodes.
(a) Pseudophyllidean Cestode has:
(i) Two slit-like grooves (bothria);
(ii) No branching uterus;
(iii) Uterine pore;
(iv) Common genital pore lying ventrally the middle line;
(v) Operculated egg hatching out ciliated larvae.
(b) Cyclophyllidean Cestode has:
(i) Fourcup-like suckers;
(ii) Uterus with lateral branches;
(iii) No uterine pore;
(iv) A laterally situated common genital pore;
(v) Non-operculated eggs which do not hatch out ciliated larvae.
Pseudophyllidean Tapeworms of Man:
Super family Bothriocephaloidea.
Genus Diphyllobothrium.
Species Diphyllobothrium latum.
Pseudophyllidean Cestodes have:
(a) Long chain of segments;
(b) Head bearing two slit-like grooves called bothriar,
(c) Ventrally situated genital pores, not marginal (three genital orifices in each segment one male orifice and two female orifices);
(d) Scattered vitelline glands in the parenchyma;
(e) Uterus opening to the exterior through which eggs come out;
(f) Operculated eggs which can develop only in water and give rise to a single ciliated embryo (first stage larva – coracidium);
(g) Two more larval development stages – the second stage larva is called Procercoid and the third stage larve Plerocercoidin fish flesh.