Erratum to: Cell Tissue Res

DOI: 10.1007/s00441-015-2238-0

The author would like to call the reader’s attention to the following:

The correct legends for Figure 2 and 3 should read:

Fig. 2 PB appearance in corpus epididymal spermatozoa. a. Regular striations of the two PBs in a transverse section of a sperm head. Bar 0.2 μm (×30,000) b. High magnification of the striations in a part of a consecutive section of the same sperm head. Bar 0.1 μm (×70,000) The PBs can be more easily observed by increasing the magnification on the screen

Fig. 3 Sagittal section of an ejaculated sperm head observed with the goniometer stage. Bar 0.1µm (×80,000). a. – 15° inclination: alignments almost perpendicular to the sperm axis in the large PB. b. + 20° inclination: alignments almost parallel to the sperm axis in the large PB. The PBs can be more easily observed by increasing the magnification on the screen

Unfortunately there was a mistake in one of the references. It should read:

Yoshida K, Ito C, Yamatoa K, Maekawa M, Toyama Y, Suzuki-Toyota F, Toshimori K (2010) A model of the acrosome progression via the acrosomal membrane-anchored protein equatorin. Reproduction 139:533-544