Fig. 7
From: The velvet worm brain unveils homologies and evolutionary novelties across panarthropods
Organisation of brain commissures in E. rowelli. Three-dimensional reconstructions based on anti-acetylated α-tubulin immunolabelling (a–c) and horizontal optical sections of confocal micrographs of brains stained for acetylated α-tubulin (a'–c'). Anterior is up in (a, a', b, b' and c'), top right corner in c and dorsal is up in c. Reconstructed brain commissures are depicted in green and shown in spatial relation to mushroom body (grey in a, b and c). Brain commissures 1 (a; ventral view) and 2 (b; dorsal view) originate from antennal neuropil and proceed adjacent to mushroom body lobes, whereas brain commissure 3 (c; posterolateral view) proceeds dorsal to mushroom body lobes. Arrowheads point to corresponding commissures. ANP, antennal neuropil; BRC 1, BRC 2, BRC 3, brain commissure 1 to 3; CBR, cell body rind; δ, dorsal or δ-lobe of mushroom body; FGC, fascicles of globuli cells; λ, lateral or λ-lobe of mushroom body; μ, median or μ-lobe of mushroom body; PED, pedunculus; PNT, ponticulus; PVN, posterior ventral neuropil; v, ventral or v-lobe of mushroom body. Scale bars: 50 μm