stat. nov. and type citation

[Charlie Butterworth]

Hello,

In 1998, a couple of colleagues published a transfer of a legitimate species of Mammillaria
into another species, but as a subspecies.  The stat nov publication contained all the
necessary information for legitimate publication, but did not cite the type specimen for the
basionym.  However, they explicitly cited the original publication details immediately under
the new combination.

So, is the "new" subspecies" illegitimately published ie. a later homonym? How would the
authors correct this?

Thank-you,

Charles A. Butterworth
Desert Botanical Garden
Phoenix, Arizona