Aforia circinata, common name the ridged turrid, is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.[1][2]
The shell grows to a length of 75 mm. The slender, elongate shell is covered with a brownish epidermis. There are six evenly rounded whorls, but with a sharp carina, above which they are smooth, whilst below it they are grooved, with wider interspaces. The anal sinus is deep, about one-third of the way from the carina to the suture.[3]
(Original description) The shell is slender, elongate and covered with a brownish epidermis. It contains six whorls , with a single, sharp, narrow carina, about the middle of the whorl in the upper whorls. This carina does not interrupt the even rotundity of the whorls so as to produce any flattening of the latter, but appears as if it had been placed upon the equator of the whorl, after the latter had been completed. The posterior surface of the carina and that part of the whorls behind it, are destitute of any but the most microscopic revolving striae, though plainly marked by the deeply notched lines of growth. The anterior surface of carina and whorls is covered with sharp, revolving grooves, with wider interspaces, being about twelve on the body whorl, between the posterior edge of the aperture and the carina. The notch is deep, and about one-third of the way from the carina to the suture. The aperture and the siphonal canal are long and narrow. The outer lip, before the carina, is effuse. The nucleus is white.[4]
This marine species occurs in the Bering Sea and in cold waters from Alaska to Japan
Aforia circinata, common name the ridged turrid, is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.
