See text Dactylella is a genus comprising 72 species of mitosporic fungi in the family Orbiliaceae.
They are notable for trapping and eating nematodes.
[1] Members of this genus form a noose structure from several elongate cells.
When stimulated by a nematode passing through the structure, the cells swell, tightening the noose and trapping the nematode.
Filaments then grow into the nematode to absorb nutrients.