There are two issues here.
1. The mother plant is extremely dessicated. It probably didn't get enough water. I can't tell from the photos - is the mother plant trying to make a new growth from the base, or did it try to do this recently? Den nobile types need a very large amount of water when pushing new growth. If they don't get it, the new growth dies quickly and the parent plant shrivels drastically. A lot of times this kind of Den will make lots of adventitious plantlets (called keikiis) from the canes when the parent plant is in danger of dying.
2. The keikiis probably have enough roots to take in enough water to stay alive while still attached to the parent plant. I agree they are too small to separate now. You need to water those rootlets to keep the keikiis alive, in case the parent plants' roots are in bad shape.
You can leave the plant as is, or you can use a sphagnum terrarium method. If you leave the plant as is, most definitely spray just those rootlets twice per day with water with a small amount of fertilizer - say 1/8 teaspoon per gallon of 20-20-20. If there is any way you can raise the humidity around the plant, that will make the kekiis much happier. If not, be sure you water their roots twice per day.
You can also use rbarata's suggestion of cutting the entire cane and laying it horizontally on top of just barely damp sphagnum moss in a large translucent plastic box. Put it into bright shade, with no direct sun, or the box will heat up and cook the plant. If the sphagnum is too wet the whole thing will rot. If you use Advanced Search with Den nobile for keywords and rbarata for username you should find it.
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