| Term: | ventral fin fold actinotrichium |
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| Note: | This page represents a term created by the combination ("post-composition") of two ontology terms. For more information on the individual terms, click the hyperlinked name. |
| Name: | ventral fin fold |
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| Synonyms: | anal fin fold, tail fin fold, ventral fin |
| Definition: | Region of the median fin fold that develops into the anal and caudal fin. |
| Ontology: | Anatomy Ontology [ZFA:0001069] |
| Name: | actinotrichium |
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| 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] |