These plants come from a humid environment. They make large clumps that stay damp all the time, and misting every day is a tease. Water it every day and let it drip in the shower. If you want to know the humidity in your house, get a hygrometer and be prepared for a shock. The average home is down around 15-20%. They like it at 60% or more. Hang it in the shower as often as you can and see the turgidity return. After a while it will make a cup base (the infertile fronds). At this point, put it in a hanging basket, wire is good. This is where you put your begonia blooms, fallen leaves, etc. Orchid bark is good. Then you can just water the cup. The one here is 60lbs or more. It hangs in a south window not too near the glass, but the fronds can reach the window. It started out smaller than the one you picture. Ficuswrangler is correct that in FL they are suited to the climate. Winters are dry, but there is a heavy dew almost every morning. Summers are wet to very wet, and every spot can count on rain at least 1X per week, plus the humidity varies from 40-100%. I use 15 gallons of water in the sitting room where the indoor plants live, we also have an aquarium that loses about 3/wk, plus we have a fountain for humidity. The result? Tonight it is 51% relative humidity at 66F and 33F outside. Our fern (Platycerium bifurcatum) can drink more than a gallon without water coming out the bottom. It hangs above a vinyl lined tray thing I built in when I was building the house. The fern hangs from the ceiling (which is 2X6 tongue and groove yellow pine) with 5/16 chain and has grown over the chain, the original wire basket it hung in has long since been swallowed by the infertile fronds. The ball is about 2ft dia., and the fronds reach out from that. It gets fed fertilizer a couple times/yr, and gets leaves, etc. put in the middle. And it likes water.

I had to laugh about the ants pouring out.... We had a large one at our old house, about 3 feet across and weighed a ton! When we moved a couple of months ago "Seymour" came with us. When we started taking it down from the tree it hung from, out poured the ants! Then when my husband climbed the ladder to disconnect it out flew a bat right into his face!!

i rehydrated bromeliads and orchids successfully to get over the initial wilt by floating them in warm water for 30-60 min with a bit of unsulphered molasses like Granma's (1tb per gallon of water) . Staghorn is epiphytic too - so perhaps you can float your wilted strand too? - at least 15-20 min, it can't hurt - just sponge it gently somewhat dry with paper towel afterwords. this is what i found: Large platycerium can be easily divided into smaller plants, and even small "chunks" that include a leaf and a bit of root ball can be potted individually. Make sure new divisions are kept warm and moist until they are growing independently. Don't get discouraged if newly cut divisions take a little time to root. --- the way i see it you don't have much to loose at this point...so try this: desinfect the brown root stub by dipping it for a minute or so in peroxide solution: like a few drops of 3% peroxide per half-cup of water - to kill the rot if it's present. then gently dry it with paper-towel. then lay the fronds flat on a table on slightly dampened paper towel. If you have a little bit of long-fibre sphagnum moss - wet it and squeeze dry and put it losely around that fuzzy root-stub that you still have attached to leaves. do not spray the sphag, just the green leaves and just a little only. the sphag should be just barely misted to remain just barely soft to touch. it has antifungal properties. the sphag should remain very loose around the stub. since it's untidy to keep just loose sphag on the table, you can use one of those strawberry-baskets - just plastic netting or a netted-bag from onions to contain sphag loosely in one place. if you don't have sphag - perhaps you can use spanish moss for the same purpose - to increase humidity around the stub to regrow roots.

I'd be inclined to treat it as a bifurcatum, that's likely how it's been treated so far and is doing well. The thing to keep in mind is that epiphytes live off rain water, some town water is loaded up with chemicals. Over watering can cause problems, even though they're mostly a rainforest plant in nature they do get a fairly dry winter. It's a very nice plant and with the right name you can also search out the best advice on it. There's a couple of dozen different species of Platycerium, I've only grown P. superbum and P. bifurcatum but would like to get a P. veitchii.