A collection of caudal vertebrae in the coccygeal region that are fused and part of the bony pelvis. [ https://orcid.org/0000-0002-6601-2165 ]

Synonyms: fused caudal vertebrae coccyx [vertebrae coccygeae I-IV] coccygeal skeleton os coccygis coccyx [coccygeal vertebrae I-IV] fused caudal vertebral column coccygeal vertebrae I-IV

This is just here as a test because I lose it

Term information

database cross reference

uberon_slim, pheno_slim, organ_slim

taxonomic disambiguation
tailbone [ FMA:20229 ]

latin term
os coccygis [ FMA:TA FMA:20229 ]

latin term
coccyx [vertebrae coccygeae I-IV] [ FMA:20229 FMA:TA ]

depicted by


external definition

Small, bony element consisting of several fused, rudimentary caudal vertebrae; near metamorphosis the hypochord fuses to the coccyx, thereby forming the urostyle.[AAO]

has related synonym


os coccygis



taxon notes

In humans: The coccyx, commonly referred to as the tailbone, is the final segment of the human vertebral column. Comprising three to five separate or fused vertebrae (the coccygeal vertebrae) below the sacrum, it is attached to the sacrum by a fibrocartilaginous joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum and the coccyx.