Abstract
Helminthological studies with Chelidae freshwater turtles in South America were conducted in Argentina, Uruguay and Brazil, where nematodes, digeneans and monogeneans were reported. In this context, the study aims to report new cases of gastrointestinal helminth parasites of Acanthochelys spixii, Hydromedusa tectifera, and Phrynops hilarii. A total of 65 hosts from the southern region of Rio Grande do Sul, Brazil, were examined. Seven taxa belonging to Nematoda, Digenea, and Monogenoidea have new cases on hosts Chelidae in South America, as well as a Nematoda and two Digenea have new host cases for Brazil. Thus, the study expands the knowledge about the diversity of helminths and the geographic distribution of taxa associated with Chelidae turtles.
Highlights
The parasites are important in the conservation of biological resources and ecosystems, as well as acting as bioindicators, are important pieces in studies of environmental impact or even conservation of host species, due to the close host-parasite interaction (Marcogliese, 2004)
Some specimens of Digenea and Monogenea were stained in Delafield's hematoxylin or Carmine's Langeron, and mounted as permanent slides in Canada balsam, and Nematoda were mounted on semi-permanent slides with Amann's lactophenol (Amato et al, 1991)
Vouchers were deposited in the "Coleção de Helmintos do Laboratório de Parasitologia de Animais Silvestres" (CHLAPASIL/UFPel), at Laboratório de Parasitologia de Animais Silvestres, Departamento de Microbiologia e Parasitologia of Universidade Federal de Pelotas, Rio Grande do Sul State, Brazil
Summary
The parasites are important in the conservation of biological resources and ecosystems, as well as acting as bioindicators, are important pieces in studies of environmental impact or even conservation of host species, due to the close host-parasite interaction (Marcogliese, 2004). The aim of this study was to report new cases of gastrointestinal helminths of Chelidae freshwater turtles in South America. New cases of gastrointestinal helminths in A. spixii, H. tectifera and P. hilarii were reported, as follow: Camallanus emydidius Mascarenhas & Müller, 2017 (Nematoda: Camallanidae) Host: Hydromedusa tectifera.
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