Figure 22. Relationship of tiered AME receptors to the first AME neuropile (AM1). 1, Camera lucida drawing of a Golgi- Kopsch impregnation of two neurons of the left AME (sixth instar Phidippus johnsoni), suggesting that the relative position of receptors in the retina correponds to the relative (retinotopic) position of corresponding, columnar terminals in the cortex of AM1. 2, Semi-diagrammatic drawing of a section through the inner (at left) and outer (at right) lobes of a Phidippus AM2, showing a 1:1 correspondence between columnar terminals of the two layers (after Hill 1975, 2006; Oberdorfer 1977). 3, Diagrammatic antero-dorsal view of the left AM1 of Phidippus. Fibers and terminals of the upper outer lobe are larger than those of the inner lobe and the lower part of the outer lobe. 4, Three views of the inner (yellow) and outer (green) lobes of the AM1. 5, Mapping of tiered AME receptors (I-IV) to respective terminal zones (TZ1-TZ4) of the AM1 of Hasarius adansoni (after Nagata, Arikawa & Kinoshita 2019). 1-4, after Hill (1975, 2006).