Subdivision of an organism along anterior-posterior axis that is the posteriormost region, extending past the anus (or cloaca, if present), consisting of a tail in some fully formed chordates (or a tail bud in embryos). In animals that have a sacral region, this is the region immediately posterior to this. [ ]

This is just here as a test because I lose it

Term information

external ontology notes

We follow XAO is distinguishing the tail region from the tail; the tail bud is part of the tail region; the tail starts after the tail bud

has related synonym

tail region
postsacral region
post-anal tail region
post-anal caudal region



taxon notes

This region is reduced in humans and corresponds to the coccyx