Parasitismo en ecosistemas de agua dulce de Chile. 2. Nematodos parásitos dePercichthys trucha(Pisces: Serranidae) con la descripción de una nueva especie deCamallanus(Nematoda: Spiruroidea)

Camallanus maculatus n. sp. (Nematoda: Camallanidae) in an ornamental fish Xiphophorus maculatus (Osteichthyes: Poeciliidae) cultivated in São Paulo State, Brazil

“…However, similar features were observed by analysing Camallanus testudineusi Gupta andVerma, 1978, C. cotti (Moravec andSey, 1988;Rigby et al, 1997); C. corderoi (Torres et al, 1990) and Camallanus truncatus Rudolphi, 1814 (Moravec, 1971(Moravec, , 1994 The present nematodes may be distinguished from C. testudineusi by a greater number of longitudinal ridges and their sleekly appearances, smaller buccal capsule and basal ring, shorter spicules, number of genital papillae and also by an enlargement at the anterior end of the smaller spicule. Also, they differ from C. cotti (Moravec and Sey, 1988;Rigby et al, 1997) by nerve ring position, testis flexure more distant from anterior end, shorter caudal alae, the highest measures of spicules in males and once more by an enlargement at the anterior extremity of the smaller spicule.…”

“…The present description resembles C. corderoi (Torres et al, 1990) to body length, buccal capsule, basal ring, smaller spicule in males, number and shape of longitudinal ridges. By the fact that C. corderoi was the most similar species, it could be observed the original material from Percichthys trucha from Villarica Lake, in Chile, kindly donated by Torres et al (1990).…”

“…(Lyan and Seng, 1979), Camallanus corderoi Torres, Teuber andMiranda, 1990 (Torres et al, 1990) and Camallanus cotti Fujita, 1927 (Font andTate, 1994;Rigby et al, 1997;Kim et al, 2002). On the other hand, the mean intensity was higher than the one registered by Torres et al (1991), in salmonids.…”

“…By the fact that C. corderoi was the most similar species, it could be observed the original material from Percichthys trucha from Villarica Lake, in Chile, kindly donated by Torres et al (1990). The strongest differences were the shape of longitudinal ridges, smaller spicule and tail shapes of females (Fig.…”

“…They could be seen into reared and native fish intestines (Amin, 1978;Baker, 1979;Ferraz and Thatcher, 1990;Lakshimi et al, 1990;Moravec 1994;Torres et al, 1991;Moravec, 1994;Martins et al, 2007). Their prevalence may reach 83.3% for both salmonids (Torres et al, 1990) and Poecilia reticulata (Kim et al, 2002) and 2.6% in Xiphophorus maculatus from ornamental fish in Florianópolis-SC (Piazza et al, 2006). This ornamental fish has a great economical importance to Brazil, since it can be found anywhere and it is very well traded.…”