Caligus asymmetricus Kabata, 1965

Caligus asymmetricus Kabata, 1965 View in CoL

( Figs 2A–E View FIGURE 2 )

Hosts: Katsuwonus pelamis (Linnaeus) ; Scomberomorus commerson (Lacepède) ( Scombridae : Scombriformes); Sphyraena barracuda (Edwards) ( Sphyraenidae : Carangiformes)

Locality: Off east coast South Africa (Indian Ocean)— K. pelamis , S. commerson ; off west coast South Africa (Atlantic Ocean)— S. barracuda

Material examined: 11♀ + 1♂

Material collected: 2♀ from S. commerson ; 7♀ + 1♂ from S. barracuda ; and 2♀ from K. pelamis

Voucher material: 3♀ ( SAMC-A099195 ) from S. barracuda deposited in the Iziko South African Museum , Cape Town, South Africa .

Adult female ( Fig. 2A View FIGURE 2 ) distinguished by its small size and short abdomen (about 10% of total length); antenna (a2) with small, narrow posterior process (arrowed) on proximal segment ( Fig. 2B View FIGURE 2 ); post-antennal process (pap) with small, acutely pointed tine ( Fig. 2B View FIGURE 2 ); sternal furca with slender, pointed tines ( Fig. 2C View FIGURE 2 ); leg 2 endopod first segment with long distolateral spinules (s), second segment outer margin with double row of 6–8 strong denticles (d) ( Fig. 2D View FIGURE 2 ); leg 4 outer spines I–III (arrowed) equal length ( Fig. 2E View FIGURE 2 ) ( cf. Cressey & Cressey 1980; Ho & Lin 2004; Boxshall 2018).

Remarks: This confirms the previous report of C. asymmetricus from S. commerson and K. pelamis off South Africa ( Oldewage & Van As 1989; Dippenaar 2004) while S. barracuda constitutes a new host record.