This name is a synonym of Haworthia coarctata var. adelaidensis (Poelln.) M.B.Bayer.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 309999) with original publication details: Beitr. Sukkulentenk. Sukkulentenpflege 2: 43 1940.
This name was in version 1 of The Plant List, record kew-309999.