Fig. 1: Class, family, type and cell.

a, Families in the columnar class. C, centrifugal; L, lamina monopolar; Lawf, lamina wide-field; Mi, medulla intrinsic; R, receptor; T1–T5, T neuron; Tm, transmedullary; TmY, transmedullary Y; Tlp, translobula plate; Y, Y neuron. b, Families in the interneuron class. Serpentine medulla (Sm) is new. Dm, distal medulla; Lai, lamina intrinsic;  Li, lobula intrinsic, LPi, lobula plate intrinsic; Pm, proximal medulla. c, Families in the cross-neuropil tangential and amacrine classes. For tangential families, axon and dendrite are distinguished graphically. All are new except for Lat and Am1. LLPt, lobula–lobula plate tangential; LMt, lobula–medulla tangential; LMa, lobula medulla amacrine; Lat, lamina tangential; MLt, medulla–lobula tangential; PDt, proximal to distal medulla tangential. A, anterior; L, lateral; M, medial; P, posterior. d, Cell types are ordered by the number of proofread cells in each type, starting with the most numerous types. Additional details are provided in Extended Data Tables 1 and 2. e, The numbers of families (left), types (middle) and cells (right) in each class. f, The numbers of types (left) and cells (right) in each neuropil-defined family. Bold font indicates families that are entirely new, or almost entirely new. MLLPa, medulla lobula lobula plate amacrine, is a synonym for Am1. g, The number of types versus the number of cells in a type. The x axis denotes type size (log-scale), and the y axis shows the number of types with matching size. The peak near 800 consists of the numerous types—those with approximately the same cardinality as the ommatidia of the compound eye.