abnormal lacrimal gland development abnormal lacrimal gland branching morphogenesis MP:0013474 MPheno.ontology anomaly of the lacrimal gland bud to repeatedly divide into lobules during development of the lacrimal gland; in mouse, the primary bud arises around E13.5 and extends caudally into the surrounding neural-crest derived periocular mesenchyme; branching is initiated between E15.5 and E16.5 from the tip of the lacrimal bud; by E18.5, the gland consists of an extensively branched exorbital lobe and a small intraocular lobe derived from a single branch of the proximal duct; branching and differentiation of lacrimal glands is complete by around eyelid opening