Editing Endocerida (section)

== Morphology==
[[Image:Endoceras.JPG|thumb|left|''[[Endoceras]]'' fossils]] 
Endocerids had a relatively small [[body chamber]] as well as a proportionally large [[siphuncle]], which in some genera reached nearly half the shell diameter. This suggests that much of the visceral mass may have been housed within the siphuncle itself rather than just in the body chamber as with other nautiloids (Teichert, 1964). Endocerids are primarily distinguished by the presence of conical calcareous deposits, known as endocones, found in the more apical portion of the siphuncle. They are thought to act as a counterweight for the animal’s body. The chambers ([[Camera (cephalopod)|camerae]]) of endocerids are always free of organic deposits, unlike [[Orthoceratoidea|orthoceratoid]] cephalopod orders such as the Orthocerida and [[Actinocerida]].

===Body size===

Endocerids reached enormous body sizes. The largest confirmed specimen, belonging to ''[[Endoceras|Endoceras giganteum]]'', is {{convert|3|m|ft}} long as preserved, but is missing a substantial portion of its aboral end.<ref name=Teichert1960/><ref name=Klug2015/> The reconstructed length of the shell is nearly {{convert|6|m|ft}}.<ref name=Teichert1960/><ref name=Klug2015/> An alleged endocerid specimen {{convert|30|ft|m}} long is unconfirmed.<ref name=Teichert1960/>