日本産深海魚から採集したFellodistomidae(吸虫綱,二生虫亜綱)

概要

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Six species of fellodistomid digeneans (Trematoda) were collected from deep-sea fishes at depths of 200 to 1,000m off the Pacific coast of central and western Japan. Two new genera are proposed : Pseudobenthotrema gen. nov. for Benthotrema richardsoni Manter, 1954 and Neomegalomyzon gen. nov. for N. physiculi sp. nov. Three new species are described : Benthotrema synaphobranchi sp. nov. from Synaphobranchus qffinis and S. brevidorsalis (Synaphobranchidae), Lomasoma japonicum sp. nov. from Ateleopus japonicus (Ateleopodidae), and Neomegalomyzon physiculi sp. nov. from Physiculus maximowiczi (Moridae). Benthotrema Manter, 1934 is emended to include B. plenum Manter, 1934 and B. synaphobranchi sp. nov. Benthotrema hoplognathi Yamaguti, 1938 is excluded from Benthotrema and considered synonymous with Pseudosteringophorus hoplognathi Yamaguti, 1940. Three previously known species are recorded : Hypertrema ambovatum Manter, 1960, Steringophorus furciger (Olsson, 1868) and Piriforma macrorhamphosi Yamaguti, 1938.