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 the cartilage found in the mesenchyme of the second pharyngeal arch in the embryo from which develop the stapes, styloid process, lesser horn and upper part of the body of the hyoid bone; its proximal end gives rise to the stylohyoid ligament