Aeneator otagoensis cookianus Dell, 1956 Aeneator otagoensis is a species of large sea snail, a whelk, a marine gastropod mollusc in the family Tudiclidae.

[1] Finlay's type description reads as follows: Aeneator otagoensis n. sp.

Easily distinguished by fewer and stouter axials, 13 per whorl just before they die out, instead of about 18; interstices equal to or wider than ribs instead of narrower or sublinear.

Spire taller, considerably higher than aperture instead of subequal to it.

Locality—22 fathoms, trawled between Otago Heads and Waikouwaiti, type and one other.