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Species diversity of parasitic flatworms of the order Trypanorhyncha Diesing, 1863 from neotropical freshwater stingrays (Myliobatiformes: Potamotrygonidae)

Grant number: 14/10220-0
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2014
Effective date (End): July 31, 2017
Field of knowledge:Biological Sciences - Zoology
Principal Investigator:Fernando Portella de Luna Marques
Grantee:Bjoern Christian Schaeffner
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Neotropical freshwater stingrays of the family Potamotrygonidae (Chondrichthyes: Myliobatiformes) represent the only family of elasmobranchs entirely restricted to freshwater habitats of South America. Like their marine relatives, they are infected with metazoan parasites, including many species of cestodes that use elasmobranchs as definitive hosts (e.g., Tetraphyllidea, Rhinebothriidea and Trypanorhyncha). Numerous reports of cestodes infecting potamotrygonid hosts can be found in the literature (see e.g., Luchetti et al., 2008; Marques, 2000; Marques & Brooks, 2003; Marques et al., 2003a, b; Reyda, 2008; Reyda & Marques, 2011). However, almost every record addresses tetraphyllidean and rhinebothriidean infections, but rarely trypanorhynchs. Cestodes of the order Trypanorhyncha are cosmopolitan parasites, predominately found in marine habitats. In Brasil, many researchers focused on larval stages of trypanorhynchs from marine fishes, while the adult worms from the spiral valve of elasmobranchs are far less frequently reported. In contrast, only two trypanorhynch species, Paroncomegas araya (Woodland, 1934) and P. baeri (López-Neyra & Días Ungría, 1958), were reported from potamotrygonid definitive hosts in South American freshwater systems. Due to the lack of knowledge regarding this particular group of cestodes, the focus on the species diversity in potamotrygonid freshwater stingrays should be further investigated. (AU)

Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SCHAEFFNER, BJOERN C.; MARQUES, FERNANDO P. L. Integrative taxonomy unravels the species diversity of Parachristianella (Cestoda : Trypanorhyncha) from both sides of the Panamanian isthmus. INVERTEBRATE SYSTEMATICS, v. 32, n. 2, p. 278-318, 2018. Web of Science Citations: 0.
TREVISAN, BRUNA; PRIMON, JULIANA F.; MARQUES, FERNANDO P. L. Systematics and diversification of Anindobothrium Marques, Brooks & Lasso, 2001 (Eucestoda: Rhinebothriidea). PLoS One, v. 12, n. 9 SEP 27 2017. Web of Science Citations: 3.
TREVISAN, BRUNA; MARQUES, FERNANDO P. L. Species diversity of Rhinebothrium Linton, 1890 (Eucestoda: Rhinebothriidea) from Styracura (Myliobatiformes: Potamotrygonidae), including the description of a new species. Zootaxa, v. 4300, n. 3, p. 421-437, AUG 3 2017. Web of Science Citations: 2.
DALLARES, SARA; CARRASSON, MAITE; SCHAEFFNER, BJOERN C. Revision of the family Sphyriocephalidae Pintner, 1913 (Cestoda: Trypanorhyncha), with the description of Heterosphyriocephalus encarnae n. sp and redescriptions of two species of Sphyriocephalus. Parasitology International, v. 66, n. 1, p. 843-862, FEB 2017. Web of Science Citations: 2.

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