Fig. 8. The stenotele explosion process (modified from Tardent and Holstein, 1982). PG in the matrix is shown in pale red, pG in the lumen of the tubule in dark red. The tubule containing the stylets and spines is ejected in the first phase of the explosion process. In the second phase of the explosion, the pG in the lumen swells, spreading the stylets and permitting the continued ejection of the tubule.