Caligus coryphaenae Steenstrup & Lutken 1861

Caligus coryphaenae Steenstrup & Lütken, 1861 (Figs 25A–D) Hosts: Thunnus albacares (Bonnaterre); Katsuwonus pelamis (Linnaeus); Euthynnus affinis (Cantor) (Scombridae: Scombriformes); Coryphaena hippurus Linnaeus (Coryphaenidae: Carangiformes) Locality: Off east coast South Africa (Indian Ocean) Material examined: 5♀ + 3♂ Material collected: 7♀ + 4♂ from T. albacares; 26♀ + 34♂ from K. pelamis; 6♀ + 10♂ from E. affinis; and 38♀ + 34♂ from C. hippurus Voucher material: 2♀ + 2♂ (SAMC-A099210) from E. affinis deposited in the Iziko South African Museum, Cape Town, South Africa. Adult female (Fig. 25A) genital complex longer than wide, posterolateral corners slightly lobate; abdomen 3-segmented, shorter than genital complex; antenna (a2) with short, rounded proximal process (arrowed); post-antennal process absent (Fig. 25B); maxillule with dentiform posterior process (mpp) short, robust (Fig. 25B); sternal furca (sf) small with short, blunt ending, divergent tines with marginal flanges (Fig. 25B); leg 1 last exopodal segment with 3 posterior pinnate setae, terminal spines 2 and 3 robust with serrated margins (arrowed) and accessory processes (Fig. 25C, cf. Fig. 81A in Ho & Lin (2004)); leg 4 3-segmented with I, I, III spines (arrowed) respectively (Fig. 25D) (cf. Cressey & Cressey 1980; Ho & Lin 2004). Remarks: The structure of leg 4 (with I, I, III spines) is similar to those of the C. diaphanus -group, but none of the remaining characteristics conform to those of the group. The report includes two new host records i.e. T. albacares and C. hippurus off South Africa.