Editing Siboglinidae (section)

===Anatomy of vestimentiferans===
[[File:Lamellibrachia satsuma.png|thumb|''[[Lamellibrachia satsuma]]'' removed from its tube: op   =  opisthosome, ves = [[vestimentum]],  ten = tentacular region, tr = trunk]]
Vestimentiferan bodies are divided into four regions: the obturaculum, vestimentum, trunk, and opisthosome. The main trunk of the body bears wing-like extensions. Unlike other siboglinids that never have a [[digestive tract]], they have one that they completely lose during [[metamorphosis]].

The obturaculum is the first anterior body part.<ref name="Miyamoto2013">{{cite journal|last1=Miyamoto|first1= Norio |last2=Shinozaki |first2= Ayuta|last3=Fujiwara |first3= Yoshihiro |date=2013-01-23|page=e55151 |title=Neuroanatomy of the Vestimentiferan Tubeworm Lamellibrachia satsuma Provides Insights into the Evolution of the Polychaete Nervous System |volume=8 |doi=10.1371/journal.pone.0055151 |journal= PLOS ONE|issue= 1 |pmid= 23372830 |pmc= 3553155 |url= https://www.researchgate.net/publication/235393504|doi-access= free }}</ref> It is possible that the obturaculum is actually an outgrowth of the vestimentum rather than a separate body segment which would distinguish it from other siboglinids.

The vestimentum, from which the group's name is derived, is a wing-like body part with glands that secrete the tube. In a ventroanterior position in the vestimentum is the brain which is postulated to be simpler than relatives that maintain a gut in the adult form.<ref name="Miyamoto2013"/> The opisthosome is the anchoring rear body part.