REVISION OF THE GENUS DICLIDOPHORA KROYER, 1838 (MONOGENEA, DICLIDOPHORIDAE), WITH THE PROPOSAL OF MACROURIDOPHORA N-G

The present study re-examines the detailed morphology of the type-spec ies, Diclidophora merlangi (Kuhn, in Nordmann, 1832) Kroyer, 1838, and other Diclidophora species parasitic on gadid fishes: D. denticulata (Olsson, 1876) Price, 1943, D. esmarkii (Th. Scott, 1901) Sproston, 19 46, D. luscae (van Beneden & Hesse, 1863) Price, 1943, D. minor (Olsso n, 1868) Sproston, 1946, D. palmata (Leuckart, 1830) Diesing, 1850, D. phycidis (Parona & Perugia, 1889) Sproston, 1946, D. pollachii (van B eneden gr Hesse, 1863) Price, 1943 and the recently described D. micro mesisti Suriano and Martorelli, 1984. An amended generic diagnosis of Diclidophora Kroyer, 1838 (synonym Diclidophora Diesing, 1850) is prov ided, which includes the presence of a prostatic vesicle in the termin al male genitalia and the distal fusion of the median and peripheral s clerites, a(1) and c(1) in the clamp anterior jaw. Macrouridophora n. g. is herein proposed for species previously considered in Diclidophor a, which are parasitic on macrourid and morid fishes. The clamp morpho logy in Macrouridophora n. g. has distinct lamellate extension attachm ents to peripheral sclerites cl and the distal portion of dl, with no distal fusion between al and cl in the anterior jaw. Macrouridophora m acruri (Brinkmann, 1942) n. comb, is chosen as the type-species. Nine other species are herein transferred to Macrouridophora n. g.: M. coel orhynchi (Robinson, 1961) n. comb., M. lotella (Machida, 1972) n. comb ., M. nezumiae (Munroe, Campbell & Zwerner, 1981) n. comb. and M. tubi formis (Rohde & Williams, 1987) n. comb. are redescribed, based on the re-examination of type or voucher specimens. Macrouridophora attenuat a (Mamaev & Zubtschenko, 1979) n. comb., M. caudata (Mamaev Br Zubtsch enko, 1984) n. comb., M. papilio (Mamaev and Avdeev, 1981) n. comb., M . paracoelorhynchi (Mamaev and Paruchin, 1979) n. comb, and M. physicu li (Mamaev and Avdeev, 1981) n. comb. have adequately described haptor al clamps in the literature. The clamp morphology in Macrouridophora s p. from Lepidorhynchus denticulatus in Australia is also considered. D iclidophora whitsonii Suriano and Martorelli, 1984 is herein transferr ed to the genus Macruricotyle Mamaev and Ljadov, 1975, as M. whitsonii (Suriano and Martorelli, 1984) n. comb. D. embiotocae Hanson, 1979 is herein considered a species incertae sedis. D. caudospina Khan & Kary akarte, 1983 and D. paddiforma Deo and Karyakarte: 1979 are herein con sidered species inquirendae. D. aglandulosa Deo, 1977, D. glandulosa D as, 1972, D. minuta Das, 1972 and D. spindale Deo, 1977 are formally d ismissed as nomina nuda. The systematic position of Diclidophora Kroye r, 1838 and Macrouridophora n. g. in the subfamily Diclidophorinae Cer fontaine, 1895 (sensu Mamaev, 1976) is discussed.