title: A study of the conjugate sperm of the dytiscid water beetles Dytiscus marginalis and Colymbetes fuscus.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D001517:Coleoptera / Q000166:cytology*; D005407:Flagella; D066298:In Vitro Techniques; D008297:Male; D008566:Membranes; D008854:Microscopy, Electron; D008870:Microtubules; D008928:Mitochondria; D013094:Spermatozoa / Q000166:cytology*