FIGURE 2 in A new species of freshwater sponge, Heteromeyenia barlettai sp. nov. from an aquarium in São Paulo, Brazil (Spongillida: Spongillidae)

FIGURE 2. Scanning electron microscopy images of spicules of the holotype (UFPEPOR 1728) of Heteromeyenia barlettai sp. nov. (a) Megascleres: acanthoxeas. (b) Detail of the shaft of a megasclere. (c) Various shapes of acanthoxea microscleres. (d) Detail of the shaft of microscleres. (e) Various shapes of birotule gemmuloscleres. (f) Detail of the shaft of gemmuloscleres. (g) Detail of the rotules of gemmuloscleres. Scale bars: a 100 µm, b 10 µm, c, e 30 µm, d, f, g 5 µm.