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''Endolobus'' is an extinct genus from the nautiloid order, Nautilida. Nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species, including ''Nautilus''. ''Endolubus'' is included in the family Koninckioceratidae which is part of the superfamily Taintocerataceae. (Kümmel, 1964. K424) The shell of ''Endolobus'' is an evolute spiral with whorl sections subelliptical; broadly rounded ventrally, narrowly rounded laterally, and slightly impressed dorsally (ibid) . There are low nodes on the flanks and the suture is slightly sinous but with a prominent dorsal lobe. The siphuncle is small, subcentral, and orthochoantic. ''Endolobus'' has a range from the Lower Carboniferous (U Miss) to the Lower Permian and has been found in different locations in North America and eastern Europe. ==References== * Kümmel,B. (1964); Nautiloidea—Nautilida, in the Treatise on Invertebrate Paleontology, Part K Nautiloidea; Geological Society of America and University of Kansas Press. * Sepkoski, J.J. Jr. (2002). A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). ''Bulletins of American Paleontology'' 363: 1–560. (Sepkoski's Online Genus Database (CEPHALOPODA) ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Endolobus」の詳細全文を読む スポンサード リンク
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