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Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial environments, such as leaf litter. Cestodes (tapeworms) and trematodes (flukes) have complex life-cycles, with mature stages that live as parasites in the digestive systems of fish or land vertebrates , and intermediate stages that infest secondary hosts.
Pseudoceros monostichos is a marine flatworm species that belongs to the ... The female system is characterized by a shallow antrum with a short and muscular vagina ...
The female system has a shallow antrum with a short vagina directed backwards surrounded by a thick and strong mass of cement gland on its first portion." [ 2 ] [ 1 ] Distribution
Schistosoma is a genus of trematodes, commonly known as blood flukes.They are parasitic flatworms responsible for a highly significant group of infections in humans termed schistosomiasis, which is considered by the World Health Organization to be the second-most socioeconomically devastating parasitic disease (after malaria), with hundreds of millions infected worldwide.
Each worm also has proglottids, which are wider segments of the tapeworm that contains both male and female reproductive organs. [1] Each mature segment has unilateral genital pores and 3 testes. When the eggs have been fertilized the segments are referred to as gravid.
The female antrum is deep and wide with a narrow and short vagina surrounded by the cement glands." ... "Marine Flatworms",CSIRO publishing ... Wikipedia® is a ...
Pseudobiceros fulgor are hermaphroditic, which means that the male and female both have their respected reproductive organ. Internal fertilization takes place when sperm and egg come together. [ 8 ] The fertilized eggs develop into juvenile flatworms and mature as smaller version of the adult due to no larval stage.
Monogenea are small parasitic flatworms mainly found on skin or gills of fish. They are rarely longer than about 2 cm. A few species infecting certain marine fish are larger, and marine forms are generally larger than those found on freshwater hosts. Monogenea are often capable of dramatically elongating and shortening as they move.