Ligophorus Euzet & Suriano, 1977

Lim, O. Y. M. Soo L. H. S., 2012, Eight New Species Of Ligophorus Euzet & Suriano, 1977 (Monogenea: Ancyrocephalidae) From Mugilids Off Peninsular Malaysia, Raffles Bulletin of Zoology 60 (2), pp. 241-264 : 262

Ligophorus Euzet & Suriano, 1977 (emended)

Ancyrocephalidae, Bychowsky, 1937 . 3 pairs of head organs, 4 eye-spots. Subterminal mouth, intestine bifurcating just posterior to pharyngeal bulb, intestinal caeca reuniting just anterior to haptor. Haptor set off from body, with 14 marginal hooks and two pairs of anchors, two connective bars, ventral bar inverted V-shape with antero-median protuberance (AMP) of one median piece with or without lateral processes which can be membranous or non-membranous. Testis median, vas deferens leaving anterior part of testis to left side of body, does not overlap sinistral caecum, continues anteriorly, extending forming seminal vesicle, narrows as vas efferens to open into smaller lobe of the bilobed initial of copulatory tube. One prostatic reservoir draining into bilobed initial part. Copulatory organ consists of tube with bilobed initial part and accessory piece which is either simple groove piece or two opposing pieces of which one is grooved. Ovary J- to U-shape, median, pre-testicular, oviduct receives tube from seminal receptacle, continues as oötype receiving Mehlis’ gland, continues as uterus to open near copulatory organ. Vagina can be non-sclerotised (not observed) or sclerotised, dextroventral, sub-median to sublateral; sclerotised vaginal tube if present enters into ovoid sperm-filled seminal receptacle located near bend of J-shaped ovary. Egg operculate, ovoid, with short filament. Parasites of Mugilidae .

Type-species. — Ligophorus vanbenedenii (Parona & Perugia, 1890) Euzet & Suriano, 1977 [syns. Tetraonchus vanbenedenii Parona & Perugia, 1890 , Ancyrocephalus vanbenedenii Johnston & Tiegs (1922) , Haplocleidus vanbenedenii Palombi (1949) , Haliotrema vanbenedenii Young (1968) ].

Type-locality. — Gulf of Genoa, Italy

Type-host. — Mugil auratus (now known as Liza aurata )

Other species. — As in Table 1