FIGURE 3A–B in New species of Acasta and Balanus (Balanoidea: Acastinae, Balaninae) from the Early Miocene (Burdigalian) of the Aquitaine Basin, France

FIGURE 3A–B. Acasta martillacensis sp. nov., paratypes (no. 85–12–69 and no. 85–12–70, respectively): A, fragment of paries transversally cut; B, fragment of paries longitudinally cut at sheath level. p, paries; r, rib; sh, sheath; sp, septae; t, tube.