title: Hysterothylacium larvae (Nematoda, Anisakidae) in the freshwater mussel Diplodon suavidicus (Lea, 1856) (Mollusca, Unioniformes, Hyriidae) in Aripuanã River, Amazon, Brazil.
abstract: Larvae of Hysterothylacium use various invertebrates as intermediate hosts. Definite hosts include fish, birds, reptiles or marine mammals. This study describes the occurrence of Hysterothylacium (Nematoda, Anisakidae) larvae parasitizing the pericardic cavity of Diplodon suavidicus (Unioniformes, Hyriidae) specimens collected in the Amazon basin, Brazil. This is the first record of this nematode parasitizing freshwater bivalves in South America. The high prevalence, medium intensity and medium abundance suggest that D. suavidicus acts as intermediate host for Hysterothylacium species in that environment.
authors.affiliation: Universidade Estadual de Maringá - Nupélia - Núcleo de Pesquisas em Limnologia, Ictiologia e Aqüicultura, Bloco G-90, Lab. de Ictioparasitologia, Av. Colombo, 5790, 87020-900-Maringá, Paraná, Brazil. lpclopes@hotmail.com
authors.forename: Luiza P C
authors.initials: LP
authors.lastname: Lopes
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Pimpão
authors.forename: Ricardo M
authors.initials: RM
authors.lastname: Takemoto
authors.forename: José C O
authors.initials: JC
authors.lastname: Malta
authors.forename: Angela M B
authors.initials: AM
authors.lastname: Varella
mesh_terms: D000818:Animals; D001199:Ascaridoidea / Q000033:anatomy & histology / Q000254:growth & development* / Q000302:isolation & purification; D049872:Bivalvia / Q000469:parasitology*; D001938:Brazil; D007814:Larva / Q000502:physiology; D011156:Population Density; D045483:Rivers / Q000469:parasitology