My Phal Liodoro has these webbings on the top of two old spikes.
I remember a year ago I've found a tiny red spider living in between the bottom leaves and I let it be. But I have never seen it again but I suspect it's the author of this.
Why I think this is not mites? The web length reaches something like 3 in and one of them, one between spikes, is almost 4 in. This is too big for a spider mite webbing.
Plus, last summer I "treated" this plant against mites as I was suspecting an attack.
Do you think I'm correct?