Figure 4 in Primary utricle structure of six Halimeda species and potential relevance for ocean acidification tolerance

Figure 4: Examples of transmission electron microscope images from which surface diameters of primary utricles (pU) were determined from six Halimeda species collected on reefs from Little Cayman Island. Note aragonite crystals in the primary inter-utricle spaces (pIUS). Scale bar = 10 µm.