title: New tentacled leech Ceratobdella quadricornuta n. g., n. sp. (Hirudinida: Piscicolidae) parasitic on the starry skate Raja georgiana Norman from the Scotia Sea, Antarctica.
abstract: A new fish leech Ceratobdella quadricornuta n. g., n. sp. (Hirudinida: Piscicolidae), a parasite of the Antarctic skate Raja georgiana Norman (Rajiformes: Rajidae) collected between the Falkland Islands and South Georgia Island in the Scotia Sea, is described and compared with related genera. Ceratobdella quadricornuta is characterised by an uncommon appearance of its anterior sucker bearing four well-developed tentacles and a unique combination of features of the reproductive and digestive systems: crop and intestine equally developed, posterior crop caeca separated; accessory glands, conductive tissue and external copulatory area lacking; common part of ejaculatory ducts (common atrium) voluminous and muscular, male copulatory bursa short, small ovisacs opening into female copulatory bursa (vagina).
authors.affiliation: Department of Zoology and Animal Ecology, V. N. Karazin Kharkiv National University, Maidan Svobody 4, Kharkiv, 61022, Ukraine, autevsk@yandex.ua.
authors.forename: Andrei
authors.initials: A
authors.lastname: Utevsky
authors.forename: Ilya
authors.initials: I
authors.lastname: Gordeev
mesh_terms: D000818:Animals; D000864:Antarctic Regions; D007865:Leeches / Q000033:anatomy & histology* / Q000145:classification* / Q000502:physiology; D012860:Skates, Fish / Q000469:parasitology*; D013045:Species Specificity