Dr. Murai Éva szerk.: Parasitologia Hungarica 18. (Budapest, 1985)
Quadriacanthus clariadis Paperna, 1961 - (Fig. 2a, b, 3, 4) Host: Cl L aria_s_lazera Locality: Bahr Mouis Location: gill filaments Number of specimens studied: 10 Description: Body elongated, with four groups of head organs, two pairs of eyespots and an opisthaptor well delimited from the rest of the body by a narrow construction. Haptor with 14 hooks and two pairs of anchors of different shapes and sizes. Body length 0. 63 (0. 5-0. 7) mm, width 0.075 (0.05-0.09) mm. Anchors simple, with sharply bending shafts, without roots but having an appendix which joins the bars. Length of dorsal anchor 48. 5 (47.0-50.0), width of its base 15.7 (12.6-17.0). Point very short, 3.4 (3.1-3.6) long. Appendix 22 (17-30) in length. Dorsal bar with trapezoid base, lateral extensions and a central process. Length of the bar 25 (22-28), width at its centre 17 (14-19.5), width with lateral extensions 36 (30-38). Length of central process 15 (13.8-15.5). Ventral anchors resembling dorsal ones but smallFig. 2. Sclerotized organs of Quadriacanthus clariadis er in size and with more developed point. Length of ventral anchors 44 (30-47), base 14 (1016) wide, point 11.5 (10-14), appendix 9.5 (8-11) long. Ventral bar-consisting of two rods, each 43 (38-46) long and 8.8 (7.5-11.0) wide, forming a V-shaped structure. Hooks different in size. A pair close to the dorsal anchors 33 (30-36) in size, another pair close to the ventral anchors 21.5 (20.0-24.5), the rest 15 (13.8-17.0) in length. Copulatory organ consisting of a 57 (47-60) long, slightly bending tube, and an elongated bilobed accessory piece. The vagina is an elongated tube, measuring 49 (22-52). Three species of Quadriacanthus are known from the gills of Clarias spp. Qu. clariadis was described by PAPERNA (1961) f rom C^ariasjazera in Israel, Qu. voltaensis by PAPERNA (1965) from Ç^aj^ajj^alkeri in Ghana, while Qu. kobiensis by HA KY (1968) from Clarias batracus in Viet-Nam. The species found by us differs from Qu. voltaensis in the shape of the sclerotised organs, from Qu. kobiensis in the shape of the copulatory organ, but resembles J3u_ 1 _c2aj~ijKlis in many respects.
