part of develops from ends during starts during mandibular crest UBERON:0007098 The most anterior of the migrating cranial neural crest streams, running along the posterior edge of the eye primordium, and in later stages, below the eye and to the border of the cement gland. The mandibular stream is the first to initiate CNC cell migration. xenopus_anatomy XAO:0000024 cranial neural crest tissue NF stage 15 NF stage 42