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These are very neat spiders. They burrow into the dirt, and they make a finger like web in the soil with a hinged top on it. They lay out trip wires of web around the entrance to be alerted when prey approaches. I was treasure hunting once and was digging up a possible find, but I dug up what looked to be the finger of a leather glove. One end of it seemed to open, and I almost had a heart attack when I saw the spider inside. The one in your picture is a male. The trapdoor spider I caught was female, and she was around 2" long. Great find. These spiders probably have the largest fangs of the Arachnid family in the USA.
If you like insects, then these are great for a framed display. Mainly because they look impressive. Nice specimen! I found one a week ago, but I think it had been hit by a car. It was a male like yours, but most of the horn was missing. Also, there was a visible crack in the pronotum. Great find though!