title: The identity of Limnoncaea diuncata Kokubo, 1914 (Copepoda: Poecilostomatoida) from Hokkaido, Japan, with the relegation of Diergasilus Do, 1981 to a junior synonym of Thersitina Norman, 1905.
abstract: Both sexes of an ergasilid copepod, Limnoncaea diuncata Kokubo, 1914, are redescribed based on planktonic specimens collected from the type-locality in Hokkaido, Japan. Comparison of this species with Thersitina gasterostei (Pagenstecher, 1861) revealed that they are conspecific. Another ergasilid genus with two claws on the antenna, Diergasilus Do, 1981, is relegated to synonymy with Thersitina Norman, 1905. The diagnosis of Thersitina is amended.
authors.affiliation: Takehara Marine Science Station, Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University, 5-8-1 Minato-machi, Takehara, Hiroshima 725-0024, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Ohtsuka
authors.forename: Ju-Shey
authors.initials: JS
authors.lastname: Ho
authors.forename: Kazuya
authors.initials: K
authors.lastname: Nagasawa
authors.forename: Jolanta
authors.initials: J
authors.lastname: Morozinska-Gogol
authors.forename: Wojciech
authors.initials: W
authors.lastname: Piasecki
mesh_terms: D000818:Animals; D033342:Copepoda / Q000033:anatomy & histology* / Q000145:classification / Q000648:ultrastructure; D005260:Female; D005880:Gills / Q000469:parasitology; D007564:Japan; D008297:Male; D008855:Microscopy, Electron, Scanning; D023701:Smegmamorpha / Q000469:parasitology*