Pseudascarophis kyphosi n.gen., n.sp. (Nematoda: Cystidicolidae) from the stomach of the fish Kyphosus cinerascens (Forskål) from Japan

Abstract

Pseudascarophis kyphosi n.gen., n.sp. (Nematoda: Cystidicolidae) is described for specimens collected from the stomach of Kyphosus cinerascens (Forskål) from the southeast coast of Japan. The new genus is distinguished from all other genera of Cystidicolidae by its oral structure (presence of four submedian, longitudinally directed, digitiform processes in the buccal cavity projecting slightly beyond the oral opening; smooth margined mouth; absence of submedian labia and sublabia; and unique shape of the medial region of the pseudolabia) and numbers of caudal papillae in the male (3 pairs preanal, 7 pairs postanal).