(A) Three-dimensional coronal volumetric rendering of the BLA in the mouse brain. Image modified from Allen Brain Explorer (Lau et al., 2008). (B,C) As in (A), but for sagittal (B) and horizontal (C) views of the mouse brain. Coronal sections defined in (D) are shown. (D) Coronal sections highlighting the anterior, intermediate, and posterior geometry of the BLA. Atlas definitions of LA vs. BA are shown (modified from Paxinos and Franklin, 2004). (E) Spatial expression of Slc17a7 via chromogenic ISH across the anterior, intermediate, and posterior BLA. Scale bar: 500 μm. Inset shows scRNA-seq expression. (F) Segmentation of Slc17a7-expressing cells from the BLA. (G,H) As in (E,F), but for Negr1 and Ddit4l, novel markers of cluster 1. For reference, locations of segmented cells are superimposed on the location of excitatory (Slc17a7-expressing) neurons within the BLA. (I,J) As in (G,H), but for Cplx1 and Lynx1, novel markers of cluster 2.