title: Microtubules in spermatozoa of childia (turbellaria, acoela) revealed by negative staining.
abstract: Many intact axial units, with attached basal plates, are found in spermatozoa of Childia groenlandica negatively stained with phosphotungstic acid. Electron micrographs show a total of nine doublet microtubules, confirming observations on sectioned material, where nine peripheral doublets, but no single central ones, occurred. Living spermatozoa move by waves progressing along a double undulating membrane.
authors.forename: D P
authors.initials: DP
authors.lastname: Costello
authors.forename: C
authors.initials: C
authors.lastname: Henley
authors.forename: C R
authors.initials: CR
authors.lastname: Ault