Females of
Ixodes (Haemixodes) uruguayensis Kohls & Clifford, 1967, a species whose adults were unknown until the present, were obtained in the laboratory from engorged nymphs collected on rodents (
Scapteromys tumidus
and
Oxymycterus nasutus
) in the counties of Maldonado and San José, Uruguay. Morphological characters of these females were identical to those given in the description of the female of Ixodes longiscutatum Boero, 1944.
I. uruguayensis is, thus, relegated to a junior subjective synonym of
I. longiscutatum. However, because of the unique morphological characters of the immature stages, the validity of the subgenus Haemixodes Kohls & Clifford, 1967 is not questioned. Therefore, the new status of
Ixodes (Haemixodes) uruguayensis Kohls & Clifford, 1967 is
Ixodes (Haemixodes) longiscutatum Boero, 1944.
