In filamentous forms there is a differentiation into branches of limited and branches of unlimited growth (Sphacelaria.)

Parkinson's disease is characterized by the aggregation of alpha-synuclein into filamentous forms within affected neurons of the basal ganglia.

They are filamentous forms, exhibiting, however, a tendency to division in more than one plane, even in the vegetative parts.

There is evidence that the dividing wall of filamentous forms is deeply pitted, as is found to be the case in red algae.

Filamentous forms induced Th1 without Th17 cell responses due to the absence of Dectin-1 ligation.