FIG. 4. — A-D, F, G in The genus Brookula Iredale, 1912 (Gastropoda, Trochidae) from Brazil: description of a new species, with notes on other South American species

FIG. 4. — A-D, F, G, Brookula pfefferi Powell, 1951; A, C, from MZSP 32504; B, D, F, G, from MZSP 32506; E, holotype of B. strebeli Powell, 1951; A-C, basal view of three specimens showing the variation on the spiral cords; D, apical view; E-G, protoconch sculpture detail. Scale bars: A-C, 250 µm; D-G, 100 µm.