Colus ombronius Dall, 1919 (original combination) Aulacofusus ombronius is a species of sea snail, a marine gastropod mollusc in the family Buccinidae, the true whelks.

[1] (Original description) The shell is of moderate size with a length of 50 mm.

;On the body whorl, especially near the periphery, these ribs have a tendency to become keeled and the interspaces wider.

The outer lip is slightly expanded and reflects the external sculpture.

The siphonal canal is two-thirds as long as the rest of the aperture and is well recurved.