FIGURE 3 in Symsagittifera smaragdina sp. nov.: A new acoel (Acoela: Acoelomorpha) from the Mediterranean Sea

FIGURE 3. Photomicrographs of Symsagittifera smaragdina sp. nov. A. Cross section of sagittocyst and surrounding muscle mantle. Scale bar: 2.5 µm, white arrow points to mitochondrium, white arrowhead points to the central filament. B. Longitudinal section of a spermatid. Scale bar: 0.5 µm, arrows point to axial microtubules, arrowheads point to axonemes. C. Cross section of a spermatid. Scale bar: 0.5 µm, arrows point to axial microtubules, arrowhead points to axoneme