New tentacled leech Ceratobdella quadricornuta n. g., n. sp. (Hirudinida: Piscicolidae) parasitic on the starry skate Raja georgiana Norman from the Scotia Sea, Antarctica
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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).
KeywordsAccessory Gland Ejaculatory Duct Male Reproductive System Conductive Tissue Falkland Island
We are grateful to Dr. Serge Utevsky (V. N. Karazin Kharkiv National University) for reading a draft of the article and valuable criticisms.
This research was supported in part by the National Antarctic Scientific Center of Ukraine, a CAML / SCAR-MarBIN TOTAL Foundation minigrant and by RFBR (Russian Fund of Fundamental Research, No. 14-04-31950 mol_a).
Conflict of interest
The authors declare that they have no conflict of interest.
Compliance with ethical standards
All applicable institutional, national and international guidelines for the care and use of animals were followed.
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