In zoology|lang=en terms the difference between leucosoid and leucosiid
is that leucosoid is (zoology) resembling or pertaining to the leucosidea , a tribe of marine crabs while leucosiid is (zoology) any member of the leucosiidae.
As an adjective leucosoid
is (zoology) resembling or pertaining to the leucosidea , a tribe of marine crabs.