| Name: | basibranchial 4 |
|---|---|
| Synonyms: | |
| Definition: | Occasionally, a fourth basibranchial ossifies in the narrow copula 2 cartilage, which lies posterior to the third basibranchial and anterior to the anteromedial articulation of the fifth ceratobranchials. |
| Ontology: | Anatomy Ontology [ZFA:0001226] |
| Name: | absent |
|---|---|
| Synonyms: | absence, absent from organism |
| Definition: | A quality denoting the lack of an entity. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000462] |