Fig. 4 in Comparative evaluation of coelomocytes in Paracentrotus sea urchins: Description of new cell types and insights on spherulocyte maturation and sea urchin physiology

Fig. 4. Scanning electron microscopy of different morphotypes (M1 to M3) of the spherulocytes in Paracentrotus sea urchins. A-I – Spherulocytes of P. gaimardi; J-R – Spherulocytes of P. lividus. A-C and J-L – Red spherulocyte; D-F and M O – Colorless spherulocyte; G-I and U-Z – Granular spherulocyte. A, D, G, J, M, and P – Morphotype 1; B, E, H, K, N, and Q – Morphotype 2; C, F, I, L, O, and R – Morphotype 3. Scale: A-J and L-R =5 μm; K =10 μm. Asterisk = nucleus. Due to the scarcity of good scanning electron microscopy pictures, photographs of M3 for both species are the same used to illustrate mature spherulocytes in Fig. 3.