Fig. 3 in Periclimenaeus apomonosi Park & De Grave 2021, sp. nov

Fig. 3. Photomicrography illustrating spermatogenic follicles in different reproductive phases of the bivalve C. fluminea (hermaphrodite). A and B, General view of male follicles in developing phase. C, Detail of primary spermatocytes. Scale bar: A = 238 µm, B = 116 µm and C = 24 µm. D and E, General view of male follicles in sperm releasing capable phase. F, Detail illustrating spermatogonia, primary spermatocytes, spermatids and spermatozoa. Scale bar: D = 460 µm, E = 238 µm and F = 60 µm. G, Panoramic view of branched male follicles in regression. H and I, Follicles exhibiting spermatogonia, primary and secondary spermatocytes, spermatids and spermatozoa. Scale bar: G = 238 µm, H = 60 µm and I = 24 µm. J and K, General structure of male follicles in recuperation. L, Detail of a follicle in recuperation showing primary and secondary spermatocytes and vestiges of spermatozoa. Scale bar: J = 238 µm, K = 115 µm and L = 24 µm. Light microscopy/Periodic Acid-Schiff/Hematoxylin/Metanil Yellow. Spermatogonia (sg), primary spermatocytes (pc), secondary spermatocytes (sc), spermatids (st), spermatozoa (sz), interconnective tissue (ct) and digestive gland (dg).