Abstract:One out of four specimens of sharks, Carcharhinus brachyurus (Günther, 1860), captured off the southern Brazilian Coast, harboured cestodes identified as Dasyrhynchus pacificus Robinson, 1965, of which the adult form is now described and referred as ocurring in Brazil.
“…Until recently, D. pacificus Robinson, 1965 was known only from the plerocercus. Sao Clemente & Gomes (1989) however described the adult cestode from Carcharhinus brachyurus from Brazil. D. variouncinatus was described very briefly from an unknown species shark from Pacific waters off New Guinea (Pintner, 1913).…”
“…Until recently, D. pacificus Robinson, 1965 was known only from the plerocercus. Sao Clemente & Gomes (1989) however described the adult cestode from Carcharhinus brachyurus from Brazil. D. variouncinatus was described very briefly from an unknown species shark from Pacific waters off New Guinea (Pintner, 1913).…”
“…In Brazil, the only reports on parasites of these hosts are related to the cestodes of the orders Tetraphyllidea and Trypanorhyncha (Rego et al 1974, Rego 1977, São Clemente & Gomes 1989a,b, 1992, São Clemente et al 1991 and to the anisakid nematodes, represented by two species: Terranova trichiuri Chandler, 1935 andT. rochalimai (Pereira, 1935) Johnston and Mawson, 1945(Vicente et al 1985, Vicente & Pinto 1999.…”
“…However, no eutetrarhynchids have yet been reported from these hosts in the southwestern Atlantic. Instead, they have been reported as hosts for tentaculariids and lacistorhynchids off Brazil (São Clemente and Gomes 1989b, Knoff et al 2002, Gomes et al 2005.…”
Eutetrarhynchid tapeworms currently comprise more than 90 marine species and 2 species reported from rivers in South America (Palm 2004, Campbell and Beveridge 2006, Schaeffner and Beveridge 2012, 2013a,b,c, Haseli 2013, Schaeffner 2014. Among the 17 genera considered valid in the family, Dollfusiella Campbell et , Prochristianella Dollfus, 1946, and Parachristianella Dollfus, 1946 are the most species-rich with 27, 20 and 9 species, respectively. Although the eutetrarhynchids are well represented in a diverse array of hosts worldwide, only a few records exist from the southwestern Atlantic, all belonging to species of Dollfusiella. Dollfusiella vooremi (São Clemente et Gomes, 1989) 1989a, Tanzola et al. 1998, Alarcos et al. 2006. Also a plerocercus of an unidentified species of Dollfusiella was reported from the teleost Micropogonias furnieri (Desmarest) in Brazil (Pereira and Boeger 2005).During a parasitological survey of teleosts and elasmobranchs in the Argentine Sea, 3 species of eutetrarhynchids were collected from batoids (Myliobatis goodei Garman and Psammobatis bergi Marini) and sharks (Mu. schmitti).
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