Koie (1973) rarely found tailed cercaria
and considered tailless cercaria
as metacercaria that do not encyst but are infective to the final host, as described by Lebour (1910).
According to Bartoli (1974), a gymnophallid cercaria
can be identified by the following characteristics: Distome, pharyngeate larva, tegument spinose, eyespots absent, stylet lacking, excretory vesicle thin-walled V or Y shaped, furcated tail, developing in marine bivalves.
maculatus in LIS mussels was Uzmann (1953), who named them Cercaria
Hugghins (1954) described the life cycle of Hysteromorpha triloba (Rudolphi, 1819) whose cercaria
is similar to Furcocercaria XIX in the morphology of the penetration gland cells, presence of three circles of spines surrounding the opening of the ventral sucker, number and position of sensory hairs on the body (one pair) and several pairs in the tail stem, resting position, size of the body (168-221/41-50 H.
Our study results, determined by using molecular techniques, confirmed that the cercaria
stage of a digenetic trematode, P.
Para el establecimiento de esta parasitosis es necesaria la coincidencia de los hospedadores intermediarios y definitivos, temperaturas mayores de 10[grados]C, suelos con deficiente drenaje y/o humedad, caracteristicas indispensable para la sobrevivencia y multiplicacion de lymneidos [5,6], asi como para sobrevivencia y diseminacion de cercarias
y metacercarias .
Similar observations were recorded by  in the snail Archachatina marginata that the digestive gland tubule becomes compressed thereby resulting reduced tubular lumen of the gland as observed by that more cercaria
and rediae were found in between the hepatic tubules and tunica propria causing extension of the space between tubules.
An efficient method for the exposure of mice to cercaria
of Schistosoma mansoni.
We cracked the shells of each live red-rim melania snail between the first and second body whorl, removed the digestive tract, and examined each for rediae and cercaria
of trematodes with a dissecting microscope at 100x total magnification.
They are unique among digeneans by having a furcocystocercous cercaria
that is macroscopic, progenetic, and actively swims, mimicking a fish prey item.
The life cycle of this digenean was first completed by Ostrowski de Nunez  in Argentina working with Pleurolophocercous cercaria
released from the naturally infected Litoridina castellanosae (= Heleobia castellanosae (Gaillard, 1974) (Gastropoda: Hydrobiidae).
Description of redia and cercaria
of Paragonimus peruvianus from experimentally infected Aroapyrgus colombiensis of Condebamba Valley, Peru.