part of glial cell larval peripheral nervous system subperineurial glial sheath embryonic/larval lateral glial cell embryonic/larval PNS subperineurial glial cell 2021-03-15T14:08:07Z fly_anatomy.ontology larval SPG-based BBB of PNS larval peripheral nervous system subperineurial glial cell larval peripheral SPG VFB:FBbt_00051073 Subperineurial glial cell of the embryonic/larval peripheral nervous system. These cells form a layer around the peripheral nerves, below the layer formed by the perineurial glial cells (Freeman, 2015). FBbt:00051073 embryonic/larval subperineurial glial cell PNS subperineurial glial cell larval PNS glial cell