Wrong end! The meral spots are on the top inside of the raptorial appendages (striking appendages). They are white in N. wennerae, but then so are they in about half of the species of gonodactylid.
Location is useful to know, but even if you knew that the animal came from Tampa Bay and was a Neogonodactylus, it could still be one of 4 species. The fact is that unless someone very experienced in stomatopod taxonomy has the specimen in hand, any identification of a species such as N. wennerae is just a guess. There are species such as G. smithii, N. curacaoensis, and G. ternatensis that are easy to tell from color and gross morphology, but there are many others that it takes me along time staring under a microscope to identify.
In the end, unless you are trying to breed them, it probably doesn't matter what the species is as long as you know the genus and the general requirements of the animal. I would suggest not obsessing over the species name - just call it George or Samantha.
Roy