This name is a synonym of Vachellia caven (Molina) Seigler & Ebinger.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13056483) with original publication details: Darwiniana 25: 77 1984.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Acacia caven in version 1 of The Plant List.