A sst GABAergic cortical interneuron that has "fanning-out' Martinotti morphology that is found in layer 2/3/5 of the cerebral cortex. They have local axon arbor and long ascending axons that spreads horizontally and arborizes significantly in L1. [ http://www.ncbi.nlm.nih.gov/pubmed/27477017 http://www.ncbi.nlm.nih.gov/pubmed/27225074 http://www.ncbi.nlm.nih.gov/pubmed/29326172 http://www.ncbi.nlm.nih.gov/pubmed/28254942 ]