Abstract
Tormopsolus brasiliensis sp. nov. is described from the intestine of Genypterus brasiliensis Regan, 1903, from Brazil. The new species is characterized mainly by having an almost square terminal oral sucker, a pharynx of the same size or larger than the oral sucker, and testes very close to each other and without vitelline follicles between them. Tormopsolus brasiliensis sp. nov. is most closely related to T. lintoni Caballero, 1952, sharing with the latter the space between the gonads and the distribution of the vitelline fields. It differs from that species by the lack of a space between the gonads and the absence of vitelline follicles between the testes; by the smaller distance between the oral and ventral suckers; by the presence of a wide ejaculatory duct armed with spines; a wide metraterm, almost the same size of the cirrus-sac; and by the shape and terminal position of the oral sucker. Specimens recovered already dead showed distinct differences to the well-fixed, freshly-collected material and are these differences are enumerated. Acanthocolpus brasiliensis of ALVES et al. (2002a,b) is considered synonym of T. brasiliensis sp. nov.
Highlights
During studies of the helminthofauna of marine fishes from the coast of Rio de Janeiro State, Brazil, 38 specimens of Genypterus brasiliensis Regan, 1903 (Ophidiidae) were examined
Three records of Tormoposolus sp. have been published; one by EL-LABADI et al (2006), for specimens recovered from Dactyloptena peterseni (Nyström, 1887), Parupeneus macronemus (Lacepède, 1801) and Priacanthus hamrur (Forsskål, 1775) from the Red Sea; one by SONGSUK & PURIVIROJKUL (2007), for specimens recovered from Nemipterus hexodon (Quoy & Gaimard, 1824), from the Gulf of Thailand; and one by PÉREZDEL OLMO et al (2008) for metacercariae recovered from Boops boops
In the present paper we propose T. brasiliensis sp. nov., a parasite of G. brasiliensis from Brazil, representing the first record of this genus in South America
Summary
Between October 2002 and September 2003 38 specimens of G. brasiliensis, 54.5-93.0 cm total length, were examined. Body elongate, tapering posteriorly, 2.62-6.32 mm (4.04 mm) long, n = 16, by 0.45-0.97 mm (0.66 mm) wide, n = 16, widest at the level of ventral sucker or ovary. Terminal, wider than long, measuring 170-310 (210) long, n = 16 by 150-350 (259) wide, n = 16. Entire, 160-400 (235) long by 130-330 (235) wide, n = 13, immediately anterior to anterior testis, vitelline follicle between ovary and testis generally absent, (in two specimens, the ovary is very close to anterior testis, 2-3 vitelline follicles between them). Vitellarium follicular; extending from posterior half of seminal vesicle to posterior extremity of body, not interrupted, overlapping ovary and testes; in some specimens vitelline follicles reach posterior margin of ventral sucker.
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