tympanic ring
http://purl.obolibrary.org/obo/UBERON_0002218
A C-shaped membranous bone that provides physical support to the tympanic membrane. The tympanic ring develops sequentially from an initial primordium in the first branchial arch growing in a circumferential fashion around the first pharyngeal cleft into the second branchial arch (Mallo and Gridley, 1996). In most mammals, the tympanic ring exists only during embryonic life, when it coordinates proper development and positioning of the eardrum (see below), and then becomes integrated into the temporal bone[PMID]. [ MP:0000030 http://www.ncbi.nlm.nih.gov/pubmed/11237469 ]
Term info
- MA:0001225
- SCTID:95952001
- AAO:0000615
- EMAPA:19197
pheno_slim
Funnel-like ring structure located lateral to the ventral ramus of the squamosal, beneath the skin; it provides support to the tympanic membrane.[AAO]
relationship loss: part_of plectral apparatus (AAO:0000443)[AAO]
in AAO 'Funnel-like ring structure located lateral to the ventral ramus of the squamosal, beneath the skin; it provides support to the tympanic membrane'., in FMA, the tympanic ring is an anatomical line. Howevever http://www.ncbi.nlm.nih.gov/pubmed/11237469 states: 'the tympanic ring, which serves as support for the tympanic membrane, directs invagination of the first pharingeal cleft ectoderm to form the external acoustic meatus (EAM), which provides the outer layer of the membrane'.
Gene notes: Gsc and Prx1 are essential for tympanic ring development
check amphibians
os tympanicum, tympanic anulus, tympanic membrane annulus, tympanic annulus, ectotympanic ring
uberon
UBERON:0002218