An unusual ciliumlike process.
D000818:Animals; D002923:Cilia; D004330:Drosophila / Q000166:cytology*; D005260:Female; D005407:Flagella; D006651:Histocytochemistry; D008297:Male; D008854:Microscopy, Electron; D013094:Spermatozoa / Q000166:cytology*