Allogastrocotyle bivaginalis, Nasir & Fuentes Zambrano, 1983

Hossen, Md Shafaet, Barton, Diane P., Wassens, Skye & Shamsi, Shokoofeh, 2022, Molecular characterisation of the Monogenea parasites of blue mackerel Scomber australasicus (Perciformes: Scombridae) in Australian waters, International Journal for Parasitology: Parasites and Wildlife 19, pp. 115-127 : 120

3.2.5. Allogastrocotyle bivaginalis

Three specimens were observed in Victorian waters ( Fig. 5a–f and Table 5). Body typically gastrocotylid, elongated and anterior extremity constricted. Two ventrolateral vaginal openings present. Haptors long, unilateral, and asymmetrical and armed with 26–28 clamps and arranged in a single row ( Fig. 5a ). Single terminal lappet and armed with two pairs of anchors; large ( Fig. 5e ) and small ( Fig. 5f ). Large anchors sickle-shaped ( Fig. 5e ). Oesophagus bifurcates posterior to the genital atrium. Genital atrium (gonopore) armed with hooks and obliquely oriented ( Fig. 5c ).

Figures

Fig. 5. Allogastrocotyle bivaginalis ex Scomber australasicus. a) Whole body; b) Oral suckers with pharynx; c) Copulatory organ; d) A typical clamp; e) Large anchors; f) Small anchors.