Post-meiotically transcribed gene that has a role in late spermiogenesis; required for actin cone progression during spermatid individualization. Expressed in primary spermatocytes and round spermatids. Low expression is seen in very short elongating cysts, but were detected at high levels in a few longer spermatid cysts. Male sterile showing spermatid individualization defects. No gross defects seen in testis organization or spermatid elongation but the seminal vesicles are empty. Belongs to the male-specific scotti family.