Fig. 3D
Calyptraea (Trochatella) pileolus d´Orbigny, 1841: 463
Infundibulum pileolus— d´Orbigny, 1847: pl. 78, figs. 5, 6, 6´
Trochita clypeolum — Powell, 1951: 127
Trochita pileolus — Pastorino & Urteaga, 2012: 70, figs. 4–12, 22–24, 34–40 (syntypes, synonymy, protoconch and radula)
Examined material. 6 an. and 13 sh. (MACN-In 40669).
Description. Shell width to 11.4 mm (up to 20 mm according to Pastorino & Urteaga 2012); conical, rounded at the base, moderately solid. Protoconch of 1.5 rounded whorls, sculptured with 6 to 8 low, wide spiral ribs, more evident towards teleoconch. Teleoconch of up to 2.5 whorls, markedly to slightly convex in outline. Suture almost imperceptible. Surface white; only sculptured with well-marked growth lines. Periostracum translucent, pale brown, extending beyond the base of the shell.