If there is some good reason for excluding marine species (or crustaceans?), please let me know.

but let me give it a try here. Any decision to include some things but exclude other things is admittedly arbitrary but necessary. Where natural divisions begin to blur (terrestrial vs. marine isopods) they can seem even more arbitrary.

In trying to hue to the generic meaning of bug as any creeping, crawling invertebrate we should probably add the word terrestrial since lobsters, crabs, barnacles, shrimp, and coral are never referred to as bugs whereas the sow bug, a terrestrial isopod, even has the term in its name.

Another blurring occurs in the case of fresh water arthropods. Water dwelling nymphs and adults were either terrestrial earlier in their phylogeny or they will be terrestrial at some point in their lifespan. Fortunately, there are no marine insects so a natural division avails itself.

Now either bugguide will include all marine crustacea or it won't. If it won't, then where should the line be drawn, just at isopods? It seems simpler and more common-sensical to exclude all marine than to exempt just one tiny crustacean group.

This argument will be introduced as a forum topic so others can weigh in.

I suppose it should go to our special section for "buglike creatures not covered by bugguide."

No, they are real. I think there may be variation in that character - I have posted some other individuals then noticed that they get labeled as the same individual!

If you notice that again, just click on Unlink.