part of larval epicranial ecdysial line coronal ecdysial line Fig 39 Abbr: CEL in ISBN:0-937548-00-6. TGMA:0000716 TGMA:0000716 The median unpaired posterior part of the epicranial ecdysial line; considered absent if the paired frontal ecdysial lines reach the posterior cranial margin separately. In mosquito larvae, sometimes absent, sometimes short and ending posteriorly in the coronal gap in late instars. coronal suture default_namespace occipital stem anatomical line