in taxon Arthropoda organism subdivision arthropod tibia Wikipedia:Arthropod_leg FBbt:00004642 TADS:0000281 this term should be ceded to the arthropod anatomy ontology. UBERON:0003131 A section of the arthropod leg. HAO:0001017 homology of leg segments between groups are difficult to prove and are the source of much argument. Some authors posit up to eleven segments per leg for the most recent common ancestor of extant arthropods, but modern arthropods have eight or fewer.