develops from develops from dermal bone actinotrichium lepidotrichium UBERON:4000172 fin ray This class was sourced from an external ontology (vertebrate_skeletal_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon ZFA:0001554 Need to review develops_from relationship to actinotrichia. Lepidotrichia require actinotrichia for development, but develops_from may not be appropriate relationship. See Zhang et al 2010 for details. doi:10.1038/nature09137 Dermal bone that is rod-like, formed and usually contained in a fin membrane, and jointed to or adjacent to distal radials. Lepidotrichia are formed from paired hemitrichia surrounding actinotrichia. There are usually two more lepidotrichia than distal radials. bony fin ray