Editing Nectocaris (section)

== Anatomy ==
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|Image         = Nectocaris 59660.jpg
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|Description   = ''Nectocaris pteryx'' from the Burgess Shale; funnel is visible folded to left of specimen. Image from Smith (2013).<ref name="Smith2013">{{cite journal | doi=10.1666/12029 | title=Nectocaridid ecology, diversity, and affinity: Early origin of a cephalopod-like body plan | date=2013 | last1=Smith | first1=Martin R. | journal=Paleobiology | volume=39 | issue=2 | pages=297–321 | bibcode=2013Pbio...39..297S | s2cid=85744624 }}</ref>
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''Nectocaris'' had a flattened, kite-shaped body with a fleshy fin running along the length of each side.<ref name=SmithAndCaron2010/> The small head had two stalked eyes, a single pair of [[Tentacle|tentacles]], and a flexible funnel-shaped structure opening out to the underside of the body.<ref name=SmithAndCaron2010/> The funnel often gets wider away from the head.<ref name="SmithAndCaron2010" /> The funnel has been suggested to represent an eversible (able to be turned inside out) [[pharynx]].<ref name=":1" /> Internally, a long cavity runs along the body axis, which is suggested to represent the digestive tract.<ref name=":1" /> The body contains a pair of [[gill]]s; the gills comprise blades emerging from a zig-zag axis. Muscle blocks surrounded the axial cavity, and are now preserved as dark blocks in the lateral body.<ref name="Smith2013c"/> The fins also show dark blocks, with fine striations superimposed over them. These striations often stand in high relief above the rock surface itself.<ref name="Smith2013c"/>