Comment 3 for bug 1851437

The ANSI standard disagrees:

http://www.lispworks.com/documentation/HyperSpec/Body/26_glo_a.htm#atomic_type_specifier

"atomic type specifier n. a type specifier that is atomic. For every atomic type specifier, x, there is an equivalent compound type specifier with no arguments supplied, (x)."

Note that the Glossary is a normative part of the ANSI CL standard.