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 one or both of a pair of depressions formed in the developing face that give rise to the rostral portion of the nasal meatus; the nasal pits indent the fronto-nasal process and divide it into a medial and two lateral nasal processes