WoRMs split the fiddlers following http://web.nchu.edu.tw/~htshih/acad/pdf/Shih&2016_Ocypodidae_revision_s.pdf. While I'm not personallya fan of this split, iNat's policy is to follow worms for Brachyura and most of the observose fiddlers have already been swapped by others. So I'm just trying to make tings consistent with these changes.