Adeuomphalus trochanter Warén & Bouchet, 2001 (additional source)
Asthelys careyi D. L. Geiger, 2017 (additional source)
Carenzia golikovi D. L. Geiger, 2017 (additional source)
Carenzia inermis Quinn, 1983 (additional source)
Oligomeria conoidea Galkin & A. N. Golikov, 1986 (additional source)
Seguenzia caliana Dall, 1919 accepted as Seguenzia stephanica Dall, 1908 (source of synonymy)
Seguenzia certoma Dall, 1919 accepted as Seguenzia stephanica Dall, 1908 (source of synonymy)
Seguenzia cervola Dall, 1919 (basis of record)
Seguenzia giovia Dall, 1919 (basis of record)
Seguenzia macleani D. L. Geiger, 2017 (additional source)
Seguenzia megaloconcha Rokop, 1972 accepted as Seguenzia cervola Dall, 1919 (source of synonymy)
Seguenzia quinni J. H. McLean, 1985 accepted as Seguenzia giovia Dall, 1919 (source of synonymy)
Seguenzia stephanica Dall, 1908 (basis of record)

 Distribution

 for Oligomeria conoidea Galkin & A. N. Golikov, 1986

Kurile Islands, Russia, to Aleutian Islands, Alaska (179°W). 88–220 m. [details]

 Distribution

 for Seguenzia giovia Dall, 1919

Off Oregon (45°N) to Southern California (33°N). 800–3900 m. [details]

 Distribution

 for Seguenzia macleani D. L. Geiger, 2017

Western Aleutian Islands, Alaska (175°W) to off Oregon (45°N). Abyssal plain, 5100 m. [details]

 Distribution

 for Seguenzia stephanica Dall, 1908

Aleutian Islands, Alaska (175°E) to Peru (3° S). 750–5100 m. [details]