Activity of the ovarian germinal epithelium in the freshwater catfish,<i>Pimelodus maculatus</i>(Teleostei: Ostariophysi: Siluriformes): Germline cysts, follicle formation and oocyte development

Abstract excerpt

Distinct types of oogonia are found in the germinal epithelium that borders the ovarian lamellae of Pimelodus maculatus: A-undifferentiated, A-differentiated and B-oogonia. This is similar to the situation observed for spermatogonia in the vertebrate testis. The single A-undifferentiated oogonia divide by mitosis giving rise to A-groups of single differentiated oogonia, each enclosed by epithelial cells that are...

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