part of part of develops from derived from ancestral fusion of caudal vertebra bony pelvis coccyx coccygeal skeleton EHDAA2:0000259 coccyx [vertebrae coccygeae I-IV] fused caudal vertebral column os coccygis UBERON:0001350 coccygeal vertebrae I-IV FMA:20229 AAO:0000731 SCTID:182028002 coccyx [coccygeal vertebrae I-IV] os coccygis MESH:D003050 Wikipedia:Coccyx NCIT:C12696 GAID:239 A collection of caudal vertebrae in the coccygeal region that are fused and part of the bony pelvis. galen:Coccyx fused caudal vertebrae bone of dorsum caudal region of vertebral column embryonic post-anal tail irregular bone