clew stage spermatid FBbt_00057171

clew stage spermatid

ID: FBbt_00057171

A round spermatid in which fusion of mitochondria into a single, spherical mass with a clew-like (spherical Nebenkern) arrangement is complete. During this stage the centriole inserts into the base of the nucleus to become the basal body. The spermatid has increased in diameter to 6 micrometers. The second nuclear membrane no longer covers the part of the nucleus opposite the basal body and is often continuous with the endoplasmic reticulum. (Fuller, 1993)