An euploid male germ cell of an early stage of spermatogenesis. In planaria, the gh4+ stem cell daughter exiting the niche undergoes three rounds of transit amplifying division with incomplete cytokinesis prior to transitioning to terminal differentiation. [ ]

An euploid male germ cell of an early stage of spermatogenesis. In planaria, the gh4+ stem cell daughter exiting the niche undergoes three rounds of transit amplifying division with incomplete cytokinesis prior to transitioning to terminal differentiation. [ http://www.ncbi.nlm.nih.gov/pubmed/27163480 http://www.ncbi.nlm.nih.gov/pubmed/27330085 ]

Synonyms: spermatogonial cell