Araiofusus colpoicus is a species of sea snail, a marine gastropod mollusk in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.
(Original description) This species resembles Barbarofusus barbarensis <small>(Trask, 1855)</small> when the latter reaches approximately 60 mm in length.
It is distinguishable from B. barbarensis by the following features:
Axial Ribs: It possesses 13 axial ribs (versus 11 in B. barbarensis). These ribs are narrower and separated by wider interspaces.
Spiral Sculpture: The revolving threads are notably sharper and exhibit a more conspicuous alternation in size.
Whorl Sculpture: On the penultimate whorl, there are 6 major and 6 minor spiral threads that cross the axial ribs without forming nodules.
At a total length of 66 mm (excluding the eroded nucleus), the shell has 8 whorls. The aperture and siphonal canal measure a combined 36 mm. The siphonal canal itself is conspicuously tortuous (twisted).
This marine species occurs in the Gulf of California