A new species of Argulus from Kosi Bay, South Africa and distribution records of the genus

Abstract

A new species of the fish ectoparasite Argulus i.e. A. kosus is described from Kosi Bay in South Africa. This species is characterised by deep antero-lateral depressions of the dorsal carapace which delimit a pronounced frontal region, scales are present on the mouth tube, varying numbers of sclerites are present on the maxillae, no flagella occur on the swimming legs nor any scales on the antennae. The shape of the respiratory areas are also typical for this species. A table of the distribution of the genus in South Africa and a map showing the localities, is also included.