| Name: | lepidotrichium |
|---|---|
| Synonyms: | fin ray, lepidotrichia |
| Definition: | Dermal bone that is rod-like, formed and usually contained in a fin membrane, and jointed to or adjacent to distal radials. They are bilaterally paired. Lepidotrichia are formed from paired hemitrichia surrounding actinotrichia. There are usually two more lepidotrichia than distal radials. |
| Ontology: | Anatomy Ontology [ZFA:0001554] |
| Name: | fin fold actinotrichium |
|---|---|
| Synonyms: | fin fold actinotrichia, median fin fold actinotrichium |
| Definition: | Portion of tissue which is a slender, horny, flexible, unsegmented fibril, which strengthens the embryonic fin fold. Actinotrichia are translucent, exhibit birefringence (double refraction) and are composed of the scleroprotein elastoidine. |
| Ontology: | Anatomy Ontology [ZFA:0000089] |