title: The spermatozoon of arthropoda. XXII. The  12+0',  14+0' or aflagellate sperm of protura.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D002875:Chromosomes; D003594:Cytoplasmic Granules; D005407:Flagella; D007313:Insecta / Q000166:cytology*; D008297:Male; D008854:Microscopy, Electron; D008928:Mitochondria; D013094:Spermatozoa / Q000166:cytology*