A surface structure that is the narrowed downward continuation of the conchal space bounded anteriorly by the borders of the tragus, posteriorly by theantitragus, and along its lower lateral margins and inferior boundary by the connection between the first two. [ http://purl.obolibrary.org/obo/UBERON_cjm http://en.wikipedia.org/wiki/Incisura_anterior_auris http://www.ncbi.nlm.nih.gov/pubmed/20082456 https://github.com/obophenotype/human-phenotype-ontology/issues/2274 ]