You're too kind, I'm just an ID nutter.
Recluse spiders, there's 4 Loxosceles species listed for Guatemala on Wiki, I don't know if there might be others.
The only one listed for Belize is Loxosceles yucatana, it's also in Guatemala.
http://en.wikipedia.org/wiki/R...
http://research.amnh.org/oonop...
Was it an orange colour?
It's a cave dweller, and isn't supposed to be dangerous to humans (found on a forum)
http://www.belizeforum.com/bel...
http://v2.boldsystems.org/view...
The Brown Recluse Spider is only in North America Lin. The bite can be nasty!
http://www.pearsonpond.com/Bro...
http://www.malevolentdesign.or...
http://www.tricopest.com/reclu...
If it was big, could it have been a Tarantula?
http://biological-diversity.in...