aptychus Definition

anaptychus, cornu ammonis, proostracum, ammonitiferous, rhyncholite, tentaculite, strombite, hippurite, turrilite, baculite, belemnoid, galerite, milleporite, entrochite, lituite, encrinite, fissurella, fossil, siphuncle, trochite, ammonite, phragmocone, bubble shell, encrinital, fossilology, spirifer, scolithus, surangular, madreporite, saxicava, astroite, loricate, planorbis, conchite, inferobranchian, lyrie, monifier, sea hare, sea snail, lithophagous, spongiolite, pholad, boat shell, bufonite, entrochal, tubiporite, hyostylic, echinite, solenacean, lorication, articulary, encrinus, scaphopod, tusk shell, nothosaur, tooth shell, auriform, epistome, paludina, nautilite, craniate, ossean, ventriculite, millepore, stromb, cauda galli, epipodium, melanian, odontolite, heterostracan, teleosaur, deltidium, hemerythrin, edaphosaurus, ichthyolite, corneocalcareous, buccinoid, gnathic, epipodite, fossilist, fungite, auriculated, entomolite, actinost, phoronid, typolite, gnathopod, maxilliped, gnathopodite, marsupite, lithodome, cephalochordate, pectinibranchiate, plate armour, branchial arch, paleornithology, dactyliology, coccosphere, scleroderm, fasciole,