Editing Nemertea (section)

=== Movement ===
[[File:Declining-soil-Crustacea-in-a-World-Heritage-Site-caused-by-land-nemertean-41598 2017 12653 MOESM2 ESM.ogv|thumb|The nemertean ''[[Geonemertes pelaensis]]'' (right) being inspected by a spider, which it then captures.]]
[[File:Lineus longissimus Grevelingen.jpg|200px|thumb|right|''Lineus longissimus'' in [[Grevelingen]]]]
Nemerteans generally move slowly,<ref name="WalkerAnderson1998Nemertea" /> though they have occasionally been documented to successfully prey on spiders or insects.<ref name="ShinobeUchida2017">{{cite journal|last1=Shinobe|first1=Shotaro|last2=Uchida|first2=Shota|last3=Mori|first3=Hideaki|last4=Okochi|first4=Isamu|last5=Chiba|first5=Satoshi|title=Declining soil Crustacea in a World Heritage Site caused by land nemertean|journal=Scientific Reports|volume=7|issue=1|pages=12400|year=2017|doi=10.1038/s41598-017-12653-4|pmid=28963523|pmc=5622052|bibcode=2017NatSR...712400S }}</ref> Most nemerteans use their external cilia to glide on surfaces on a trail of [[Mucus|slime]], some of which is produced by glands in the head. Larger species use muscular waves to crawl, and some aquatic species swim by dorso-ventral undulations. Some species burrow by means of muscular [[peristalsis]], and have powerful muscles.<ref name="RFB2004FormBodyProboscis" /> Some species of the [[Order (biology)|suborder]] [[Monostilifera]], whose proboscis have one active stylet, move by extending the proboscis, sticking it to an object and pulling the animal toward the object.<ref name="RFB2004Diversity" />