The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural anomaly of either of the two pits that appear bilaterally in the region destined to become the forebrain as the cranial neural folds fuse; these optic pits or sulci continue to deepen laterally and bulge from the two sides of the forebrain to become the optic vesicles