The parasitic crustaceans of fishes from the Brazilian Amazon, 13, Gamidactylus jaraquensis gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) from the nasal fossae of Semaprochilodus insignis (Schomburgk). Amazoniana, 8(3) 1984: 421-426. 422 [Zoological Record Volume 121]