develops from ends during starts during migratory neural crest cell glial cell Schwann cell precursor xenopus_anatomy CL:0002375 A giioblast cell that develops from a migratory neural crest cell. It is embedded among neurons (axons) with minimal extracellular spaces separating them from nerve cell membranes and has no basal lamina. XAO:0006035 NF stage 22 NF stage 32