| Name: | quadrate |
|---|---|
| Synonyms: | quadrates |
| Definition: | The quadrate is the dorsal bone in the jaw joint with the anguloarticular of the lower jaw. Ossification of the quadrate, a cartilage bone, begins as a posteriorly projecting membranous spine between the symplectic cartilage and the preopercle (5.1 mm NL). The body of the quadrate ossifies first at the ball-and-socket articulation with the anguloarticular (6.5 mm). The adult quadrate is shaped roughly like an inverted triangle with a long, posteriorly projecting spine off its posteroventral edge. The presence of a posteroventral or posterior process of the quadrate is a synapomorphy of Teleostei. |
| Ontology: | Anatomy Ontology [ZFA:0000621] |
| Name: | fused with |
|---|---|
| Synonyms: | coalesced, fused, fused to, joined with, merged with |
| Definition: | A structural quality inhering in a bearer by virtue of the bearer's being merged with another entity. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000642] |
| Name: | anguloarticular |
|---|---|
| Synonyms: | articular |
| Definition: | Dermal and endochondral compound bone that results from the fusion of the dermal angular and the endochondral articular and forms the posterior part of the lower jaw. It articulates with the dentary anteriorly and with the retroarticular postero-medially. The anguloarticular is paired. |
| Ontology: | Anatomy Ontology [ZFA:0000467] |