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Rudolphiella szidati sp. n. (Proteocephalidea: Monticelliidae, Rudolphiellinae) parasite of Luciopimelodus pati (Valenciennes, 1840) (Pisces: Pimelodidae) from Argentina with new observations on Rudophiella lobosa (Riggenbach, 1895)

2000; Natural History Museum of Geneva; Volume: 107; Linguagem: Inglês

10.5962/bhl.part.80119

0035-418X

Alicia A. Gil de Pertierra, Alain de Chambrier,

Fish Biology and Ecology Studies

Monticelliidae, Rudolphiellinae) parasite of Luciopimelodus pati (Valenciennes, 1840) (Pisces: Pimelodidae) from Argentina with new observations on Rudolphiella lobosa (Riggenbach, 1895).-Rudolphiella szidati sp.n. (Cestoda, Monticelliidae, Rudolphiellinae) is described from the anterior intestine of the pimelodid fish, Luciopimelodus pati caught in Parana river and de la Plata river (Argentina).Additional informations to the description of the type material of Rudolphiella lobosa (type species of the genus) is given.R. lobosa was not found in L. pati (as reported originally by Riggenbach, 1895) and has never been found since its original description.The new species differs from other species of Rudolphiella by its larger scolex, a higher number of testes and by its distinct egg shape.A diagnosis of Rudolphiella is given.The following taxonomical actions are introduced: Rudolphiella piracatinga (Woodland, 1935) comb.nov.for Monticellia piracatinga Woodland, 1935; Monticellia rugata Rego, 1975 syn.nov. of Rudolphiella piracatinga (Woodland, 1935).The presence of glandular cells within the scolex's apex is observed in all known Rudolphiella species 1.e.R. lobosa, R. myoides, R. szidati, R. piracatinga, R. piranabu.Rudolphiella, the sole genus within Rudolphiellinae, is widespread in a monophyletic group of hosts (Calophysus-group sensu de Pinna, 1998) suggesting likely coevolution.