Redescription of Prosthenhystera obesa (Diesing, 1850) (Callodistomidae, Digenea) with New Host Records and Data on Morphological Variability

Abstract

Prosthenhystera obesa (Diesing,1850) Travassos, 1922

Metazoan parasites of Mandi-amarelo Pimelodus maculatus and of Jundiá Rhamdia quelen (Osteichthyes: Siluriformes) of Paraíba do Sul River, Volta Redonda, Rio de Janeiro

“…Another relevant fact on the composition of the parasite fauna described in our study is the lack of digenetic organisms, metacercaria and adults, which were described by other authors (KOHN et al, 1997;PAVANELLI et al, 1997;PAVANELLI, 2004;BACHMANN et al, 2007;SANTOS et al, 2007). According to Kennedy (1993), the number of parasite species of the infracommunities is considered to be a reflex of the number of host species in the same location and of the capacity of transmitting and infecting intermediary and definitive hosts.…”

“…On the parasite fauna of these siluforms, a number of taxonomic studies as well as studies on the occurrence of these species are of great importance. These include the studies by Cellere et al (2002), Martins et al (2004), and Matos et al (2005) on Myxozoa; Kohn (1990), Kritsky et al (1995Kritsky et al ( , 2000, , Boeger et al (2001), Cohen andKohn (2008), andCarvalho et al (2009) on Monogenea; Kohn and Froes (1986), Kohn et al (1997), Amato, S. and Amato, J. F. R. (1993), Bello et al (2000), Brasil-Sato and Pavanelli (2004), Vianna et al (2005), Kohn et al (2007), and Silva et al (2008) on Digenea; Pavanelli and Santos (1992), Rego et al (1999), and Pertierra (2002) on Cestoda; Brasil-Sato and and Santos et al (2008) on Acanthocephala; Travassos et al (1928), Pinto et al (1974), Kohn et al (1985), Kohn and Fernandes (1987), Vicente et al (1985), Moreira et al (1991), Thatcher (1991), Moravec et al (1993a, b), Moravec (1998), Pinto (1999), Brasil-Sato (2003), and Madi and Silva (2005) on Nematoda; and Boxshall and Montú (1997) Ecological studies of the parasite fauna of P. maculatus were done by Brasil-Sato and Pavanelli (1999), and contain data on the acanthocephalus Neoechinorhynchus pimelodi by Pavanelli et al (1997) on endoparasitic helminthes of species of the Paraná River; by Santos et al (2007) and Albuquerque et al (2008) on metazoan and endoparasites o...…”

Helminth fauna parasitizing Pimelodus pohli (Actinopterygii: Pimelodidae) from the upper São Francisco River, Brazil

“…In the São Francisco River Basin, the records on the parasite fauna of pimelodids were established for Conorhynchos conirostris (Valenciennes, 1840) by Pinto et al (1974), Pinto and Noronha (1976), Vicente et al (1985), and Brasil-Sato and Santos (2005); for Pseudoplatystoma corruscans (Spix & Agassiz, 1829) by Rego and Gibson (1989), Kohn et al (1997), and Corrêa and Brasil-Sato (2008); for Bergiaria westermanni (Lütken, 1874) by Moreira et al (1991) and Vicente and Pinto (1999); for P. maculatus by BrasilSato and Pavanelli ( , 1999Pavanelli ( , 2000Pavanelli ( , 2004, Brasil-Sato (2003), and Monteiro et al (2010); and for P. pohli by Martins et al (2012). In this last work, the authors have established the first record of a parasite species, Prosthenhystera obesa (Diesing, 1850), in the gall bladder of P. pohli.…”

“…Studies on parasitism in pimelodids have been also conducted in other localities of Brazil, such as some helminth parasites of species of Pimelodus Lacepède, 1803: P. blochii Valenciennes, 1840in Paraná River (KOHN et al, 1997; P. fur (Lütken, 1874) in Paraná River ; P. maculatus in Amazon Basin in Guaiba River (KOHN;FRÓES, 1986;FORTES et al, 1993;SARMENTO et al, 1995); in Guandu River (SANTOS et al, 2007;ALBUQUERQUE et al, 2008;AZEVEDO et al, 2010); in Itajaí-Açu River (BACHMANN et al, 2007); in Mogi Guaçu River (TRAVASSOS; KOHN, 1965;KOHN et al, 1985;FERNANDES, 1987;AGUIAR et al, 2011); in Paraiba do Sul River (VENANCIO et al, 2010); in Paraná River (TRAVASSOS; KOHN, 1965;MACHADO DOS SANTOS, 1992;MORAVEC et al, 1993MORAVEC et al, , 1997KOHN et al, 1997;PAVANELLI, 2004;KOHN, 2008;KOHN et al, 2011;LOPES et al, 2011); in Paranapanema River (RAMOS et al, 2013); Pimelodus microstoma Steindachner, 1877 in Mogi Guaçu River (AGUIAR et al, 2011) [note of the authors: this fish species was cited by the authors as P. heraldoi Azpelicueta, 2001, that is a junior synonym of P. microstoma Stein., sensu Ribeiro and Lucena (2010) KOHN, 2001;KOHN et al, 2011); Pimelodus sp. in Amazon Basin (VICENTE et al, 1978).…”

Report of Didymocystis wedli Ariola, 1902 (Digenea; Didymozoidae) from Thunnus albacares in Brazil

“…The fishes were obtained from fishermen and brought to the laboratory to be examined; gills were removed and examined in a saline medium under stereoscopic microscopy and cysts were dissected to release the worms.The methodology used was described in Kohn et al (1997). Measurements are in micrometer unless otherwise stated, with means in parentheses, followed by the number of measurements made (n).…”