The germinal proliferation center in the testis of Drosophila melanogaster.
D000818:Animals; D004331:Drosophila melanogaster; D007814:Larva; D008297:Male; D008938:Mitosis; D012669:Seminal Vesicles / Q000648:ultrastructure; D013094:Spermatozoa / Q000254:growth & development; D013737:Testis / Q000648:ultrastructure*