part of start stage end stage peripheral nervous system immature Schwann cell ZFA:0001725 CL:0002377 Range covers Schwann cell precursor and immature Schwann cell, should be split and put into CL. zebrafish_anatomy A glial cell that develops from a Schwann cell precursor. The immature Schwann cell is embedded among neurons (axons) with minimal extracellular spaces separating them from nerve cell membranes and has a basal lamina. Cells can survive without an axon present. Immature Schwann cell can be found communally ensheathing large groups of axons. Melissa Haendel 2009-09-08T02:10:35Z TAO:0002203 glial cell (sensu Vertebrata) segmentation:10-13 somites pharyngula:high-pec