Notocotylus breviserialis has been collected from Anas
bahamenis L. and Amazonetta brasiliensis (Gmelin), in Marica,
State of Rio de Janeiro, Brazil. It is the first time that
this digenean is collected as adult in its natural hosts, and
this is its first record for the Neotropical region. The
prevalence of N. breviserialis was 5.56% and 18.18% in A.
bahamensis and in A. brasiliensis, respectively. New
morphological data about the location of the vitelline glands
and previtellinic space measurements are presented.
