part of start stage end stage glomerular layer multi-tissue structure olfactory bulb protoglomerulus Ceri 2013-04-29T11:55:43Z zebrafish_anatomy Multi-tissue structure part of the olfactory bulb comprised of ciliated and microvillous olfactory sensory neurons projections that form specialized neuropilar regions comprised of olfactory sensor axons and the dendrites of olfactory bulb neurons. glomerular precursors ZFA:0005668 unknown hatching:long-pec