Trochita pileolus (d´Orbigny, 1841)

Luca, Javier Di & Zelaya, Diego G., 2019, Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity, Zootaxa 4544 (1), pp. 41-78 : 52

Trochita pileolus (d´Orbigny, 1841)

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.

Figures

FIGURE 3. A. Eumetula cf. dilecta Thiele, 1912, MACN-In 40680, scale bar = 1 mm. B. Newtoniellidae sp. 1, MACN-In 40678, scale bar = 1 mm. C. Newtoniellidae sp. 2, MACN-In 40679, scale bar = 1 mm. D. Trochita pileolus (d´Orbigny, 1841), MACN-In 40669, scale bar = 2 mm. E. Eatoniella denticula Ponder & Worsfold, 1994, MACN-In 40670, scale bar = 1 mm. F. Tectonatica impervia (Philippi, 1845), MACN-In 40671, scale bar = 2 mm. G. Onoba fuegoensis (Strebel, 1908), MACN-In 40672, scale bar = 1 mm. H. “Anomacme” multituberculata Castellanos, Rolán & Bartolotta, 1987, MACN-In 40682, scale bar = 1 mm. I. Antistreptus magellanicus Dall, 1902, MACN-In 40681, scale bar = 1 mm. J. Microdeuthria michaelseni (Strebel, 1905), MACN-In 40684, scale bar = 2 mm. K. Pareuthria fuscata (Bruguière, 1789), MACN-In 40683, scale bar = 5 mm.