On a New Species of Lepeophtheirus (Copepoda parasitica) from Pseudopleuronectis americanus Walbaum

Abstract

In early April 1961 while I was looking for parasitic copepods in fish specimens preserved in our specimen gallery, I discovered two different kinds of parasite coexisting on a single flat-fish, Pseudopleuronectis americanus Walbaum (26.5 cm long). Some of them, 19 in number, were found on the inner margin of the operculum, and have been identified as the present new species. The other 22 individuals, restricted to the gill filaments, were identified as belonging to the Lernaeopodidae. Because I do not have complete references at hand, I shall leave them to be studied later. It is interesting to find two kinds of parasites belonging to two different families on the same fish.