New deep-sea species of Aborjinia (Nematoda, Leptosomatidae) from the North-Western Pacific: an integrative taxonomy and phylogeny Author Zograf, Julia K. A. V. Zhirmunsky National Scientific Center of Marine Biology, FEB RAS, 690041, Vladivostok, Russia zojulia@yandex.ru Author Semenchenko, Alexander A. Federal Scientific Center of the East Asia Terrestrial Biodiversity, FEB RAS, 690022, Vladivostok, Russia Author Mordukhovich, Vladimir V. A. V. Zhirmunsky National Scientific Center of Marine Biology, FEB RAS, 690041, Vladivostok, Russia & Far Eastern Federal University, 690922, Vladivostok, Russia text ZooKeys 2024 2024-01-17 1189 231 256 http://dx.doi.org/10.3897/zookeys.1189.111825 journal article http://dx.doi.org/10.3897/zookeys.1189.111825 1313-2970-1189-231 FCBFC6313C494B98BD021C63654837FE B3209808DF775FA99E2105DDC703973E Aborjinia Oezdikmen , 2010 Diagnosis (emended after Tchesunov and Spiridonov 1985 ; Miljutin 2003 , 2014a ). Very large nematodes; at the larval stage parasitize marine invertebrates. Adult worms are free-living. Three lips. Pharynx cylindrical, muscular, with tri-radial internal lumen. Rectum and anus present. Outer labial and cephalic sensilla papilliform, situated in one circle. Amphideal fovea small, pore-like. Cervical setae absent. Excretory-secretory system consists of two cells. Female reproductive system didelphic, amphidelphic, ovaries hologonic. Male reproductive system didelphic, testes outstretched. Tail convex-conoid, broadly rounded. Type species. Aborjinia eulagiscae (Tchesunov & Spiridonov, 1985): Oezdikmen 2010 , by original designation [= Australonema eulagiscae Tchesunov & Spiridonov, 1985]. Invalid species. Aborjinia corallicola Westerman, de Moura Neves, Ahmed & Holovachov, 2021. = Paraborjinia corallicola (Westerman, de Moura Neves, Ahmed & Holovachov, 2021), comb. nov.