Acetabulum pusillum Howe, 1909: 89–91, pl. 6: figs. 13–15; pl. 7: figs. 1–4 (type locality: Montego Bay, Jamaica).
Acetabularia pusilla (Howe) Collins, 1909b: 379.—Kalugina-Gutnik, Perestenko, & Titlyanova, 1992: 23 (table 1).— Titlyanova, 1992: 38.— Titlyanova, Perestenko, & Kalugina-Gutnik, 1992: 44.
INDIAN OCEAN DISTRIBUTION: Aldabra Islands, Seychelles.