Heptabrachia gracilis Ivanov, 1957 (original description)
Heptabrachia subtilis Ivanov, 1957 (original description)
Lamellisabella johanssoni Ivanov, 1957 (original description)
Oligobrachia Ivanov, 1957 (original description)
Oligobrachia dogieli Ivanov, 1957 (original description)
Polybrachia gorbunovi (Ivanov, 1949) (new combination reference)
Siboglinum caulleryi Ivanov, 1957 (original description)
Siboglinum cinctutum Ivanov, 1957 (original description)
Siboglinum fedotovi Ivanov, 1957 (original description)
Siboglinum minutum Ivanov, 1957 (original description)
Siboglinum pellucidum Ivanov, 1957 (original description)
Siboglinum plumosum Ivanov, 1957 (original description)
Spirobrachia beklemischevi Ivanov, 1957 accepted as
Volvobrachia beklemischevi (Ivanov, 1957) (original description)
Zenkevitchiana Ivanov, 1957 (original description)
Zenkevitchiana longissima Ivanov, 1957 (original description)
Type locality
Kuril–Kamchatka Trench, NW. Pacific Ocean, 9000-9050 m [details]