here is a good website to ID them and pick one that you want. remember it is most likely that we can only get smashers spearers are very hard to get
http://www.ucmp.berkeley.edu/arthro.../eumalacostraca/royslist/index.html#directory
http://www.ucmp.berkeley.edu/arthro.../eumalacostraca/royslist/index.html#directory