Microtubules in Spermatozoa of Childia (Turbellaria, Acoela) Revealed by Negative Staining

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Science  14 Feb 1969:
Vol. 163, Issue 3868, pp. 678-679
DOI: 10.1126/science.163.3868.678


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.

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