title: A new species of parasitic copepod, Sarcotretes umitakae sp. n. (Siphonostomatoida, Pennellidae), on the rattail (Actinopterygii, Macrouridae) from the East China Sea, Japan.
abstract: A new species of copepod, Sarcotretes umitakaesp. n., of the siphonostomatoid family Pennellidae is described based on female specimens from the rattail Coelorinchus jordani Smith and Pope (Actinopterygii: Gadiformes: Macrouridae) caught in the East China Sea. This species is characterized by exhibiting the following characters: the large proboscis projects strongly; the head bears paired lateral processes which are bulbous and taper into a slender horn; the twisting neck is significantly longer than the trunk; and the trunk bears an anterior constriction with a reduced abdomen.
authors.affiliation: Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Uyeno
authors.forename: Kaori
authors.initials: K
authors.lastname: Wakabayashi
authors.forename: Kazuya
authors.initials: K
authors.lastname: Nagasawa
keywords: East China Sea; Mesoparasitic copepods; Sarcotretes umitakae sp. n. ; mesopelagic fishes; new species; rattail