Temnocefalídeos foram encontrados sobre imaturos de Kempnyia reticulata (Klapálek, 1916) coletados no Córrego Bonito, em uma seção de primeira ordem (19°58'28,4”S, 40°31'54,4”W), na Estação Biológica de Santa Lúcia (EBSL), Santa Teresa, Espírito Santo, Brasil. Vinte e nove imaturos foram examinados, cinco (17.24%) estavam positivos para espécimes de Temnocephala Blanchard, 1849. Juvenis e adultos foram encontrados sobre a cabeça, o mesonoto e as pernas médias de seus hospedeiros. Ovos foram encontrados em grande número sobre as brânquias intratorácicas. Os caracteres mais distintivos de Temnocephala stoneflyi n. sp foram o cirro e o par de sincícios pós-tentaculares, ou placas excretoras (PEs). A comparação da anatomia geral e, em particular, da morfologia do cirro e das PEs com Temnocephala curvicirri Amato & Amato, 2005 epibionte sobre heterópteros aquát...

Specimens and eggs of Temnocephala pereirai Volonterio, 2010 found on Trachemys dorbigni (Duméril & Bibron, 1835), were reported for the first time extending the known geographical distribution of T. pereirai from Uruguay to southern Brazil. Sixteen turtles were collected from a dam at 'Centro Agropecuário da Palma', Universidade Federal de Pelotas (UFPel), Municipality of Capão do Leão, State of Rio Grande do Sul, Brazil. The helminthes were fixed according to our standard protocols. Juvenile and adult temnocephalans were translucent and without the red-eye pigmentation. The worms were living in the inner corners of the plastron, near the legs, together with the eggs, and in the center of the plastron. Eggs were elongated, thick-shelled, with a small and subpolar filament. The most distinctive features of this species were: 1. cirrus's introvert proximal portion with spines from...

Temnocephala longivaginata sp. n., an ectosymbiont on Dilocarcinus septemdentatus (Herbst, 1783), is described from crabs in the State of Pará, Brazilian Amazonia. Fifty crabs were collected from the Rio Peixe-Boi, Municipality of Peixe-Boi. Dilocarcinus septemdentatus is the type host of Temnocephala microdactyla Monticelli, 1903, a species with a precarious original description, but redescribed on two other occasions from different hosts: Sylviocarcinus australis Magalhães & Türkay, 1996 and Dilocarcinus pagei Stimpson, 1861. The new species is most similar to Temnocephala pignalberiae Dioni, 1967, but differs by having the following characters: 1. cirrus with a circle of sclerites in the distal portion of the introvert, followed by a smooth portion (without spines or ridges); 2. proximal, inner portion of the introvert with longitudinal ridges; 3. vesicula 'intermedia' long, re...