Fig. 6
From: Also looking like Limulus? – retinula axons and visual neuropils of Amblypygi (whip spiders)
General anatomy of visual neuropils and protocerebrum in Amblypygi, sagittal sections. Heterophrynus elaphus (a-g) and Damon medius (h-k); Wigglesworth stains (a-g) and μCT (h-k, additional raw data on morph-D-base). a, Dorsal to the first median eye visual neuropil lies the first lateral eye neuropil. Bar 250 μm. b, c, Detail of the first median and lateral eye visual neuropil. Bars 50 μm. d, Section showing a tract connecting the first and second median eye neuropil, the second median eye neuropil, and the second lateral eye neuropil. Bar 100 μm. E, Mid-sagittal section showing the mushroom body lobes filling almost the entire protocerebrum. Note the relatively small arcuate body. Bar 250 μm. f, g, Detail of the arcuate body in parasagittal (f) and midsagittal (g) region. Bars 50 μm. h, i, μCT reconstruction showing the first and second median eye visual neuropil and a tract (arrow) connecting these two neuropils. Bars 250 μm. j, k, μCT reconstruction showing the first and second lateral eye visual neuropil and a tract (arrow) connecting these two neuropils. Bars 250 μm. AB, arcuate body; MBC, mushroom body calyces; MBL, mushroom body lobes; M1, first median eye visual neuropil; M2, second median eye visual neuropil; L1, first lateral eye neuropil; L2, second lateral eye neuropil; arrow, tract connecting M1 and M2; arrowhead tract connecting L1 and L2