Cestodes in South American Freshwater Teleost Fishes: Keys to Genera and Brief Description of Species
Cestodes in South American freshwater teleost fishes: keys to genera and brief description of species Amilcar Arandas Rego 1 James C. Chubb 2 Gilberto C. Pavanelli 3 ABSTRACT. Keys to genera of cestodes in South American freshwater teleost fi shes are provided, with diagnoses of genera and short descriptions of species. Two new genera are proposed, Chambrie/la gen. n. for Goezee/la agoslinhoi Pavanelli & Santos, 1992 and G. paranaensis Pavanelli & Rego, 1989, and Brooksie/la gcn.n. tor A/JIpho lero/JIO/phus praepulialis Rego, Santos & Silva, 1974. Nomimoscolex /JIagna Rego, Santos & Silva, 1974, previously species inquirenda, is transferred to the genus Proleocephalus Weinland, 1858. Goezee/la nupeliensis Pavanelli & Rego, 1989 is considered a species inquirenda. Species and host lists are included. KEY WORDS . Cestoda, Proteocephalidea, freshwater fi shes, parasitology Eighty nine taxa of cestodes from six orders are known in South American freshwater teleost fishes . Most belong to the Order Proteocephalidea, found parti cularly in siluriform fishes . Classi fication of Proteocephalidea is based on the studies of LA RUE (19 I I, 1914), WOODLAND (I933a,b,c, 1934a,b,c, 1935a,b,c), FREZE (1965), WARDL E & McLEOD (1952), SCHMlDT (1986) and REGO (1994). BROOKS (1978) and BROOKS & RASMUSSEN (1984) acknowledged two major taxa of Proteocephalidea, Proteo cephalidae and Monticelliidae, established by LA RUE (191 I). Separation at fami1y levei was based on arrangement of the reproductive organs in re lation to the longitudinal muscle bund1es. REGO (1995) recommended modification to the taxo nomy, suggesting that South American proteocephalids should be reduced to one family Proteocephalidae, with two subfamilies, Corallobothriinae and Proteocepha linae, distinguished by the presence or absence ofa metascolex.
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