Extrusion type dehiscence
extrusion-type dehiscence (noun,ascus term, pl. extrusion-type dehiscences) – a kind of ascus dehiscence by which the exo- and endoascus become at least partially separated during dehiscence. The extrusion of the endoascus may be barely visible (eversion-type dehiscence), forming a beak-like projection (rostrate, semi-fissitunicate) or it may be very distinct with the endo- and exoascus separating almost entirely (fissitunicate, functionally bitunicate). The active spore discharge is often "explosive", the flexible endoascus forcibly ejected out of a bursting exoascus ("jack-in-the-box"), thus shooting the spores into the environment. Kind of:ascus dehiscence type.