Treatise on invertebrate paleontology. Part K. Mollusca. Volume 3. Cephalopoda-general features-endoceratoidea-actinoceratoidea-nautiloidea-bactritoidea / Трактат по палеонтологии беспозвоночных. Часть K. Mollusca. Том 3. Цефалоподы и др.

The cephalopods described in this volume are divided into the orders Ellesmero-cerida, Endocerida, Intejocerida, Actino-cerida, Orthocerida, Ascocerida, Disco-sorida, Oncocerida, Tarphycerida, Bar-randeocerida, and Nautilida. Descriptions of them are followed by that of the Bactri-tida, the taxonomic status and affinities of which are unsettled. The named orders include all the cephalopods which from the middle of the 19th century until comparatively recently were assigned to a single taxon “Nautiloidea,” first recognized and named by de Blainville in 1825 and generally regarded as a suprafamilial category, being classified by different authors as suborder, order, superorder, or subclass. This taxon was long contrasted with the Am-monoidea (Treatise, Part L), and considered to be equal in rank with this assemblage. <...>