Cyclostrema trochoides Friele, 1874, [Basis of the current name] Attributed to: Jeffreys MS Range: 70°N to 68°N; 32°W to 23°W Depth: 60 to 145 m (live 60 to 50 m) Maximum Reported Size: 3 mm Distribution: Greenland: East Greenland References: Thorson (1944) DdLlNSEWM Combining Genera: Tharsiella
Cyclostrema laevigatum Friele, 1874, [Synonym] Attributed to: Jeffreys Range: 82°N to 74°N; 30.5°W to 0°W Depth: 180 to 160 m (live 180 to 160 m) Maximum Reported Size: 1.5 mm Distribution: Greenland: North Greenland, East Greenland References: Thorson (1944) S; Schiötte (1989) DdLlNEWM
