Revision of the genus Schistorophus Railliet, 1916 (Nematoda: Acuarioidea)
The genus Schistorophus is revised and five species are recognized: (1) S. longicornis (Hemprich and Ehrenberg in Schneider, 1866) with S. indica (Sanwal, 1952) and S. limosae Mawson, 1968 as its new synonyms; (2) S. skrjabini (Vassilkova, 1926); (3) S. cirripedesmi Rhizhikov and Khokhlova, 1964 with S. brygooi Petter, 1967 and S. lii Daiya, Bondarenko and Gubanov, 1971 as its new synonyms; (4) S. cornutus Sobolev, 1943; and (5) S. guschanskoi Ablasov and Chibichenko, 1962. Redescriptions of S. longicornis, S. skrjabini, and S. cirripedesmi are provided. Schistorophus bicuspis (Rudolphi, 1819), Schistorophus laciniatus (Molin, 1860b), Strongylus ambiguus Rudolphi, 1802, and Spiroptera sternaehirundinis Deslongchamps, 1824 are regarded as species inquirendae. One species, Schistorophus acanthocephalica (Molin, 1860a), is considered a synonym of Paracuaria adunca (Creplin, 1846). Four species are transferred to the following genera: Viktorocara capillaris (Molin, 1860c) n. comb., Viktorocara aulieatina (Skrjabin, 1916) n. comb., Stellocaronema spinulosus (Molin, 1860c) n. comb., and Sciadiocara bihamata (Mueller, 1897) n. comb. A key to species is also provided.