"Baculites " and related Cretaceous straight ammonite cephalopods are often confused with the superficially similar orthocerid nautiloid cephalopods.
12.
"Anoploceras " is a Middle and Upper Triassic nautiloid included in the Tainoceratidae, known from eastern Europe.
13.
The Ellesmerocerida have been revised to include only primitive nautiloid cephalopods with thick connecting rings and siphuncle segments that are concave in outline.
14.
"Tylonautilus " is a member of the Tainoceratidae which, with other related families, forms the nautiloid superfamily Tainocerataceae.
15.
""'Kindleoceras " "'is an nautiloid cephalopods that lived during the Middle and Late Ordovician.
16.
""'Homoadelphoceras " "'is a gyroconic rutoceratid Nautiloid from the Middle Devonian of central Europe.
17.
Unable to study extinct nautiloid DNA, we had to figure out a new way to classify these animals based on their shells alone.
18.
""'Tripteroceroides " "'is a nautiloid cephalopods with expanded siphuncle segments included in the superorder Orthoceratoidea.
19.
Tarphycerids are more closely related to the diverse Oncocerida, through the ancestral Bassleroceratidae in the Lower Ordovician, than to the other nautiloid orders.
20.
""'Tetrapleuroceras " "'is an extinct prehistoric nautiloid from the Lower Permian of the Urals in Russia.
