Experimental study of the life history of Echinostoma parvocirrus n. sp. (Trematoda: Echinostomatidae), a larval parasite of Biomphalaria glabrata in Guadeloupe.SUMMARY. The larval stages and adult of a new species of Echinostome with 37 collar spines originating from Guadeloupe are described. The first intermediate host is the snail vector of Schistosoma mansoni in this island, Biomphalaria glabrata. Metacercariae encyst in the pericardial sac of the same snail and the physid snail Physa marmorata, as in kidneys of tadpoles of Bufo marinus. Adult develops experimentally in ducklings of Cairina moschata and in canaris but not in ducklings of Anas platyrhyncos, pigeons, chicks, albino mice, Ratlus rattus, or wild and albino R. norvegicus. The natural final host is unknown.