The aeglids are freshwater crustaceans, playing an important role in the trophic chain for various invertebrate and vertebrate organisms. A specimen of Aegla spinosa Blond-Buckup & Buckup, 1994, from the interior of the municipality of Bocaina do Sul, state of Santa Catarina, was brought to the Laboratory of Parasitology and Zoology at the University of Planalto Catarinense (UNIPLAC). The examined crustacean presented three specimens of Temnocephala. As these animals are vulnerable to environmental changes and alterations in the natural landscape due to anthropic pressure, knowing the presence of temnocephalids can contribute to understanding the associations between these organisms and their hosts, especially in the state of Santa Catarina, where there is a lack of descriptions for the invertebrate fauna.

A single specimen of Belostoma sp., a hemipteran belostomatid insect from the interior of the city of Bocaina do Sul, state of Santa Catarina, was brought to the Laboratory of Parasitology and Zoology of Universidade do Planalto Catarinense (UNIPLAC), Brazil. The hemipteran examined was infested with two specimens of Temnocephala curvicirri Amato & Amato, 2005, found on the ventral surface of Belostoma sp. between the second and third locomotor pair of the insect. Externally, the light colored helminth is characterized by the presence of an adhesive disk with a fingerlike appearance. The temnocephalid was identified by its extremely long and curved cirrus. This is the first report of the presence of T. curvicirri in Santa Catarina.