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This article reports the first occurrence of Rhytidodes gelatinosus (Rudolphi, 1819) Looss, 1901 (Digenea: Rhytidodidae) in the olive-ridley turtle Lepidochelys olivacea (Testudines: Chelonidae), in an individual found in the State of Sergipe, Brazil. Although R. gelatinosus has already been described in other species of sea turtles in the world, this is the first report of this parasite in L. olivacea . We also present a list of hosts and locations where this helminth has already been identified., Competing Interests: Conflict of Interest Authors declare no conflict of interest., (© 2023 J. Da Cunha Fernandes et al., published by Sciendo.)

The helminth fauna of juvenile green sea turtles ( Chelonia mydas Linnaeus, 1758) is still poorly known. Herein, we study the gastrointestinal helminths of 28 juvenile green sea turtles found stranded on the north coast of Rio de Janeiro state, Brazil. All turtles were infected showing a rich helminth fauna. In total, 14802 trematodes belonging to 30 species and 5 families including Micros-caphidiidae, Plagiorchiidae, Pronocephalidae, Hapalotrematidae, and Telorchiidae were recovered. An unidentified nematode specimens was also found. The mean intensity was 536 (95% CI = 362 - 853) (range: 1 - 2831), and the species richness was 7.86 (95% CI = 6.46 - 9.21) (range: 1 - 17). The coast of Rio de Janeiro state represents new locality records for Angiodictyum posterovitellatum, Microscaphidium aberrans, M. warui, Octangium hyphalum, O. sagitta, Enodiotrema reductum and Pleurogonius laterouterus . This study confirms that the green sea turtle harbors the richest helminth fauna among sea turtle species and provides useful information on the gastrointestinal helminths of a poorly known stage in the life cycle of this endangered chelonian., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2023 B. Cavaco et al., published by Sciendo.)

The present study reports the first occurrence of Plesiochorus cymbiformis (Digenea: Gorgoderidae), in two Olive Ridley Sea turtles Lepidochelys olivacea (Testudines: Chelonidae), from the states of São Paulo and Sergipe in Brazilian coast. Concerning the Neotropical region, P. cymbiformis has been previously reported in green sea turtles ( Chelonia mydas ) from Panama and Brazil, in loggerhead sea turtles ( Caretta caretta ) from Brazil, in hawksbill sea turtles ( Eretmochelys imbricata ) from Puerto Rico, and in Olive Ridley Sea turtles only in Costa Rica. Lesions resulting from the presence of parasites in the hosts' urinary bladders are also presented. This is the second report on endoparasites in Olive Ridley sea turtles from Brazil., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2021 H. Jerdy, R. B. Ferioli, H. Gallo Neto, M. Zíllio, A. Monteiro, E. C. Q. Carvalho, M. R. Werneck, published by Sciendo.)

This paper reports three recovered species of digeneans from an adult loggerhead sea turtle - Caretta caretta (Testudines, Cheloniidae) in Brazil. These trematodes include Diaschistorchis pandus (Pronocephalidae), Cymatocarpus solearis (Brachycoeliidae) and Rhytidodes gelatinosus (Rhytidodidae) The first two represent new geographic records. A list of helminths reported from the Neotropical region, Gulf of Mexico and USA (Florida) is presented., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2021 B. Cavaco, L. M. Madeira De Carvalho, M. R. Werneck , published by Sciendo.)

Pyelosomum cochlear Looss 1899 (Digenea: Pronocephalidae) is a parasite exclusive to sea turtles, having been described in the green turtle ( Chelonia mydas ) in Egypt, the USA, Panama, Costa Rica and Brazil as well as the olive ridley turtle ( Lepidochelys olivacea ) in Brazil. The present note describes the first occurrence of P. cochlear in a hawksbill turtle ( Eretmochelys imbricata ) found on the coast of Brazil., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2019 M. R. Werneck, R. Velloso, P. B. Costa Das Chagas, H. Jerdy Leandro, R. Martins De Amorim, published by Sciendo.)

The present note describes the occurrence of Rhytidodoides intestinalis and Rhytidodoides similis (Digenea: Rhytidodidae) in the gallbladder of two juvenile green turtles ( Chelonia mydas - Testudines, Cheloniidae) found on the coast of Brazil. Both were detected in gallbladder and intestine of green turtles: Rhytidodoides similis (United States, Panama, Costa Rica and Brazil) and R. intestinais (United States, Panama and Costa Rica). This note is the first report of R. intestinalis in Brazil and South-West Atlantic Ocean. Also the histological lesions caused by the parasites in one gallbladder are described., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2019 M. R. Werneck, A. Mastrangelli, R. Velloso, P. Baldassin, H. Jerdy, E. C. Q. Carvalho, published by Sciendo.)

The side-necked turtle Hydromedusa tectifera commonly inhabits the tributary streams of the Rio de La Plata and occasionally is found in brackish waters within the estuary of the Rio de La Plata. Few studies have been conducted on its parasitic fauna, especially in Argentina. In the present work Amphiorchis sp. is registered for the first time in a freshwater turtle, expanding the knowledge about the specifi city of the genus that until now was considered inhabiting only marine turtles., Competing Interests: Conflict of Interest Authors state no conflict of interest., (© 2019 E. Palumbo, M. R. Werneck, J. I. Diaz, published by Sciendo.)