<unk>  under a light microscope: Notice the uterus; this species is monoecious. An adult<unk>  is a flattened (dorsoventrally) and leaf-shaped fluke. The body is slightly elongated and slender, measuring 15–20 mm in length and 3–4 mm in width. It narrows at the anterior region into a small opening called the oral sucker, which act as the mouth. From the mouth, two tubes called caeca run the length of body. They are the digestive and excretory tracts. The posterior end is broad and blunt. A poorly developed ventral sucker lies behind the oral sucker, at about one-fourth of the body length from the anterior end. A common genital pore opens just in front of it. As a hermaphrodite, it has both male and female reproductive organs. A single rounded ovary is at the centre of the body, and two testes are towards the posterior end. The uterus from the ovary, and seminal ducts from the testes, meet and open at the genital pore. The testes are highly branched. Other highly branched organs called vitellaria (or vitelline glands) are distributed on either side of the body. The eggs are similar to those of other related flukes such as Opisthorchis viverrini and O. felineus, and are often confused during diagnosis. They small and oval in shape, measuring about 30 x 15 μm in diameter. They are sharply curved and with a clear convex operculum towards the narrower end. At the broader end is a stem-shaped knob. The miracidium can be seen inside the fertilised egg.
Clonorchis sinensis
Echinostoma cinetorchis
Haplorchis taichui
Taenia asiatica
Opisthorchis felineus
Taenia solium
Opisthorchis viverrini
Schistosoma japonicum