The division of neuroblasts in the subpallium area of the forebrain. The interneuron precursors that these cells give rise to include GABAergic interneurons and will migrate tangentially. [ GOC:dgh http://www.ncbi.nlm.nih.gov/pubmed/12626695 http://purl.obolibrary.org/obo/go/references/0000021 GOC:cls GOC:dph GOC:jid ]