Lampanyctophilus wisneri gen. et sp. n. (Monogenea: Diclidophoridae), a gill parasite of Lampanyctus ritteri (Myctophidae) from the eastern Pacific and an emended description of Myctophiphilus sprostonae (Martin, 1973) comb. n. Proceedings of the Helminthological Society of Washington, 53(2) 1986: 157-161. 157 [Zoological Record Volume 123]