Ultrastructural evidence for Sertoli-like cells in the testis of the asteroid,Luidia clathrata(Say) (Echinodermata: Platyasterida)

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Abstract
Non-germinal cells arise adjacent to the basal lamina and extend between the numerous germinal celli. Nuclei of these non-germinal cells may be positioned near the basal lamina or more peripherally between the spermatocytes. Thin cytoplasmic processes extend between the spermatocytes to the spermatids. These cytoplasmic processes vary in electron density from the cytoplasm of the germinal cells. These non-germinal cells closely resemble the vertebrate Sertoli cell.