showgenera.php%3Ftaxon=231&rank=class
AbrytasitesAcanthohoplitesAcanthonautilusAdelocerasAktjubocheilusAnkylocerasAntigyrocerasAskeatonolucidumAstreptocerasBalashoviaBambusocerasBeatitesBelemnites (genus)BellocerasBrevicocerasCalhounocerasCapriocornitesCarbactinocerasCornuellaCyrthoceratitesDawsonocerinaDesmocerasDevonocheilusEndolobusEophyllitesEriditesEudocerasFaberocerasFissilobicerasFoliocerasFournierellaFranklinocerasGermanonautilusGoniatitesGreenlandocerasGyrocerasHamulinaHauericerasHemichoanellaHeminautilus