Trichostemma grimaldi n.sp. Topsent, 1892a; Topsent, 1913: 21, pl. I fig. 4.
Polymastia penicillus : Vosmaer, 1882b: 26, pl. I figs. 12-13, pl. IV figs. 127-132 (in part); Hansen, 1885: 9; Fristedt, 1887: 434 (not: Spongia penicillus Montagu = P . mamillaris )
Polymastia grimaldi : Boury-Esnault, 1987: 42, fig. 7.