RESUMEN
The genus Desmogonius (Digenea: Pronocephalidae) is known only from sea turtles and currently contains two species: D. desmogonius Stephens, 1911 and D. loossi Chattopadhyaya, 1972. The present study describes a third species, Desmogonius baldassinae n. sp. found in a juvenile green sea turtle (Chelonia mydas) from Brazil. The new species is larger than its congeners in all dimensions, with vitellinic fields ending posterior to the ovary. In addition, we present a key for species identification and an emended diagnosis of the genus Desmogonius.
Asunto(s)
Trematodos/aislamiento & purificación , Infecciones por Trematodos/veterinaria , Tortugas/parasitología , Animales , Brasil , Femenino , Trematodos/clasificación , Infecciones por Trematodos/parasitologíaRESUMEN
The hawksbill turtle Eretmochelys imbricata is a critically endangered species with a worldwide distribution. Limited information is available about the naturally occurring intestinal parasites of this species and what impact these parasites may have on the health of the hawksbill turtle. Diaschistorchis pandus was identified postmortem in 5 hawksbill turtles from Grenada, West Indies, using morphologic characterization. Sanger sequencing was performed for conserved ribosomal regions (5.8S, ITS2, 28S) and the mitochondrial cytochrome c oxidase subunit 1 gene (COI). Phylogenetic analysis of the 28S rRNA gene sequence data shows D. pandus clustering with other trematodes in the family Pronocephalidae, corroborating morphological classification. No genetic sequences have been previously reported for this trematode species, which has limited the collection of objective epidemiological data about this parasite of marine turtles.
Asunto(s)
Trematodos/clasificación , Infecciones por Trematodos/veterinaria , Tortugas/parasitología , Animales , Autopsia/veterinaria , ADN de Helmintos/química , ADN de Helmintos/genética , Especies en Peligro de Extinción , Grenada , Intestino Delgado/parasitología , Intestino Delgado/patología , Masculino , Filogenia , ARN Ribosómico 28S/genética , Trematodos/anatomía & histología , Trematodos/genética , Trematodos/aislamiento & purificación , Infecciones por Trematodos/parasitologíaRESUMEN
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.