anaptychus Definition

aptychus, baculite, cornu ammonis, ammonite, rhyncholite, ammonitiferous, proostracum, belemnoid, fissurella, bubble shell, strombite, tooth shell, scaphopod, phragmocone, hippurite, lituite, planorbis, tusk shell, siphuncle, inferobranchian, conchiferous, sea snail, tentaculite, sea hare, galerite, conchite, seasnail, turrilite, neritid, encrinite, cephalopod, lithophagous, encrinital, saxicava, pholad, stromb, boat shell, melanian, moon shell, loricate, auriform, bufonite, sea devil, paludina, scaphopoda, operculate, entrochite, nautilite, fossil, mollusc, mollusk genus, fossilology, ark shell, solenacean, butterfly fish, genus nerita, echinite, spirifer, mollusk, gastropod, milleporite, spongiolite, epipodial, shelly, nothosaur, ossean, epistome, lorication, deltidium, madreporite, pholas, trochite, astrophyton, lamellibranch, orthid, lyrie, ichthyolite, monifier, sarcopterygian, scleroderm, cauda galli, belemnite, teleosaur, trilobite, anthozoan, phoronid, heterostracan, molluscoid, chelicerate, astroite, haemocoel, epipodium, hemerythrin, ventriculite, hippocrepian, testacean, surangular, encrinus, buccinoid, pectinibranchiate,