An aperture of 0.3e0.4 mmwas observed at one end of the exosporium.
The rupture of the spore coats occurs adjacent to the opening in the exosporium.
The germinated cell emerges through this hole in the spore coat and then through the pre-existing aperture in the exosporium, before eventually being released,
leaving behind a largely intact exosporium with an enlarged aperture (0.7e1.0 mm) and coat shell.
The formation of this aperture,
its function and its alignment with the spore coat is discussed.