title: Ultrastructure of the spermatophores in Tetrodontophora bielanensis (Waga) (Collembola).
mesh_terms: D000818:Animals; D007313:Insecta / Q000648:ultrastructure*; D008297:Male; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D013093:Spermatogonia / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*