Distribution of DCX+/Tbr1+cells in the pallium of mammals and a lizard. (A) The distribution of layer II DCX+/Tbr1+ cells either newly generated (yellow) or non-newly generated (red) is shown in a schematic view of mammalian allocortical and neocortical regions. The neocortex is schematized according to Sanides in three concentric rings: peri-allocortex, proisocortex, and isocortex. The isocortex contains the primary sensory areas from which information flows through a hierarchichal sequence of areas and reaches either the lateral (LEC) or medial enthorinal cortex (MEC). Areas connected with LEC and MEC are shown in pink and turquoise green respectively, feedforward (solid arrows) and feedback (dashed arrow) pathways are also shown. (B) Schematic coronal sections showing the distribution of DCX+/Tbr1+ cells in different pallial domains in mammals (left) and lizard (right). Additional abbreviations: A1, primary auditory cortex; AC, anterior cingulate cortex; DP, dorsal pallium; IL, infralimbic cortex; Ins, insular cortex; pPC posterior piriform cortex; aPC; anterior piriform cortex; PreL, prelimbic cortex; PreS, presubiculum; POR, postrhinal cortex; Prh, perirhinal cortex; RSP, retrosplenial cortex; SUB, subiculum. Redrawn from Luzzati et al. (2009).