Redescription of Nothobomolochus triceros (Bassett-Smith, 1898) (Copepoda, Cyclopoida, Bomolochidae), with descriptions of the male and copepodids V-II of the species

Abstract

Abstract Nothobomolochus triceros (Bassett-Smith, 1898), based on specimens recovered from the original host Pampus argenteus (Euphrasen, 1788) in Japan, are redescribed, and the male, both sexes of copepodids V and IV, and sex undetermined copepodids III and II of the species are described for the first time. The maxilliped is sexually dimorphic only in the adult in Bomolochidae, on the other hand, the rostral plate, antennule, and legs 1, 4, and 5 are sexually dimorphic in Nothobomolochus throughout the adult and copepodids V-IV. Sex is as yet undetermined in copepodids III and II in the genus.