FIG 1.

(Aa) Formation of a sporangiophore of the genus Conidiobolus developing a sticky conidium on top of the structure. (b) As the conidium matures, an invagination is formed at the base of the conidium (arrows), exerting pressure on the base. (c) The invagination suddenly everts, propelling the conidium away from the sporangiophore. (Ba) Basidiobolus sporangiophore developing a conidium at the top of the structure. The subconidial portion of the sporangiophore accumulates liquid that becomes turgid (arrows). (b) The continuing accumulation of liquid exerts extreme pressure at the base, forming a subconidial vesicle, and the pressure results in rupture and the abrupt release of the conidium. (c) The subconidial structure remains attached, but it detaches upon landing.