G. chiragra. Yes a 33g would be plenty large, but it will get lost in there and you'll likely never see it. I suggest a 10g, but line the bottom with strips of acrylic... they are one of the hard hitters when they get bigger. tankmates can be just about anything you wouldn't mind losing; fast water column dwelling things stand a better chance. damsels for instance. Also, nothing that might eat the mantis (lions, triggers, puffers, octopus, other mantis shrimp, etc). for removal, i suggest the bottle trap.
http://www.mantisshrimps.co.uk/articles/removal.php