« Shell […] lenticular, relatively thick-walled. Protoconch […] weakly heterostrophic. Teleoconch […] yellowish, sculpture consisting of spiral ribs crossed by slightly weaker, near-orthocline axial ribs, forming granules at intersections and conferring a reticulated appearance. Upper side and peripheral base slightly convex. Aperture circular; easily distinguishable peripheral keel formed by a strong lower peripheral rib; upper peripheral rib strength similar to that of subsutural rib. Infraperipheral rib distinctly separated from lower peripheral rib, as strong as following basal ribs. » – Cavallari, Salvador & Simone: “Taxonomical study on the Architectonicidae collected by the Marion Dufresne (MD55) expedition to SE Brazil”, Spixiana vol. 37, München 2014, p.36.

« Basal field sculpture similar to upper side, but with strong basal keel dividing basal field into convex peripheral part (bearing smaller, more numerous granules) and a concave inner part (coarser, bigger granules); umbilicus wide; umbilical crenae strong, with weakly demarcated nodules. » – Ibid. Above: 36m deep, Velika Luka, Omiš, Split-Dalmatia Comitat, S. Croatia. 7,15mm. Original pictures provided by R. Stanić (HR) – (CC BY-NC-SA).