Actually, Hemisquilla is a modified smasher. It does not have the heavily armored and enlarged dactyl heal that is found in other gonodactyloids. It probably split off from other stomatopod lines quite a while back. There are only three species in the genus, one found on the west coast of the Americas, one in Brazil, and one in western Australia.
Typically, they do not do well in aquaria. although if you can provide an opportunity for them to burrow and water in the 15-17 C range, they will survive for at least several months.
You may remember that I posted a request on this site a month or two back asking for leads in obtaining several Hemisquilla. This is the height of breeding season for them in southern California and when they frequently show up in trawls. If anyone sees some for sale, please contact me.
Roy