1964. Cephalopoda - general features - Endoceratoidea - Actinoceratoidea - Nautiloidea - Bactritoidea. (mineralienatlas.de)
Basil JA, Bahctinova I, Kuroiwa K, Lee N, Mims D, Preis M, Soucier C (2005) The function of the rhinophore and the tentacles of Nautilus pompilius L. (cephalopoda, nautiloidea) in orientation to odor. (karger.com)
The sub-class Nautiloidea is divided into two super-orders, Nautilosiphonata and Calciosiphonata, basedon different structural types of the connecting rings.The late Cambrian order Plectronocerida has the calciosiphonate type of connecting ring similar tothat in post-Cambrian orthocerids. (diva-portal.org)
Members1
Unlike its sister group Nautiloidea, whose members have a rigid outer shell for protection, the coleoids have at most an internal bone or shell that is used for buoyancy or support. (absoluteastronomy.com)
Subclass3
The nautilus is the only extant (living) representatives of the subclass Nautiloidea, a once diverse and abundant group that originated in the Cambrian period 500 million years ago (mya) and flourished during the Paleozoic and Mesozoic eras. (newworldencyclopedia.org)
Nautiloidea (Nautiloid) is a subclass of cephalopods . (eol.org)
Having survived relatively unchanged for 450 million years, nautiluses represent the only living members of the subclass Nautiloidea. (hepburnandhughes.com)