| Name: | caudal fin procurrent ray |
|---|---|
| Synonyms: | caudal procurrent lepidotrichium, caudal procurrent ray |
| Definition: | Caudal fin lepidotrichium that is located anterior to the principal caudal fin rays. Caudal procurrent rays are unbranched. |
| Ontology: | Anatomy Ontology [ZFA:0001584] |
| Name: | actinotrichium |
|---|---|
| Synonyms: | actinotrichia |
| Definition: | Skeletal element which is a slender, horny, flexible, unsegmented fibril which provide structural support to fin folds or fins. Actinotrichia are translucent, exhibit birefringence (double refraction) and are composed of the scleroprotein elastoidine. |
| Ontology: | Anatomy Ontology [ZFA:0005435] |