Acromegalomma circumspectum (Moore, 1923) comb. n.

Branchiomma circumspectum Moore 1923: 239-241, plate XVIII figs 41-42.

Type locality.

Between S. 35° W, 3.5 miles (5.6 km) and S. 43° W, 5.2 miles (8.4 km) off Brockway Point, Santa Rosa Island, Channel Islands, California, Pacific coast of the USA (34.02°, -120.22°; estimated geolocation).