Figure 2: Urea-induced morphogenesis is common in nematode-trapping fungi.
From: Bacteria can mobilize nematode-trapping fungi to kill nematodes

Bayesian inference phylogeny of the ITS regions of nematode-trapping fungi in the family Orbiliaceae, Ascomycota. The model filamentous fungus Neurospora crassa is used as outgroup. Trapping structures are AC, adhesive columns; AK, adhesive knobs; AN, adhesive networks and CR, constricting rings.