On Some Filarial Parasites of South American Primates, with a Description ofTetrapetalonema tamarinaen.sp. from the Peruvian Tamarin Marmoset,Tamarinus nigricollis(Spix, 1823)

The results of a survey of 194 Peruvian and Colombian primates for filarial infections are presented. Nine genera and 14 species of marmosets and monkeys are represented in the survey. A blood film survey revealed microfilariae in 82, of 42% of the animals. Adult worms were recovered from 21 of 61 dissected animals. The 209 adult worms belong to four species:Dipetalonema gracile, Dipetalonema caudispina, Tetrapetalonema marmosetae, andTetrapetalonema tamarinae, a new species. 2. New host records forDipetalonema gracile are: Tamarinus nigricollis, Cebus albifrons, andSaimiri boliviensis. Saimiri boliviensisis a new host forDipetalonema caudispina. New hosts forTetrapetalonema marmosetaeare:Oedipomidas oedipus, Saimiri sciurea, S. boliviensis, andAteles paniscus. 3. The adult worms and microfilaria of a new species of filarial worm,Teirapetalonema tamarinae, are described from a Peruvian tamarin marmoset,Tamarinus nigricollis.