Fig. 6 in Reproductive cycle of the Neotropical cichlid yellow peacock bass Cichla kelberi: A novel pattern of testicular development

Fig. 6. Testicular morphological characteristics of Mid GE Development phase in C. kelberi. (a and b) Testicular anastomosing region, highlighting the beginning of the germinal epithelium discontinuity (asterisk), in both the anastomosing region and lobules near the main testicular ducts. (c) Discontinuous germinal epithelium, with cysts in different development stages and lots of sperm (Sz) in the lobular lumen. (d) Peripheral lobular region (dorsal) highlighting the continuous germinal epithelium and clusters of primary spermatogonia (dotted line). ar - anastomosing region; dt - main testicular ducts; I - interstice; m - basal membrane; mt - metaphase; S - Sertoli cell; Sc1 - primary spermatocysts; Sg1 - primary spermatogonia; Sg2 - secondary spermatogonia; St - spermatids; ta - tunica albuginea; cytoplasmic extension (hollow arrow). H.E. stain.