Definition of Cyrtoconic. Meaning of Cyrtoconic. Synonyms of Cyrtoconic

- were variable in form. Some were straight (orthoconic), others curved (cyrtoconic); some were long (longiconic), others short (breviconic). Some long-s****ed...
- transitional fossils showing the transition from a straight s****, to a curved (cyrtoconic) s**** to a relaxed (gyroconic) spiral and finally to a tight spiral....
- some even tiny, laterally compressed, curved (cyrtoconic) or straight (orthoconic). Most cyrtoconic forms are endogastric, with the ventral side longitudinally...
- embryonic s****. Bactritida (Erben 1964) are characterized by orthoconic to cyrtoconic s**** that may be long or short with a narrow siphuncle invariably in...
- Members of this subclass usually have orthoconic (straight) to slightly cyrtoconic (curved) s****, and central to subcentral siphuncles which may bear internal...
- annulate s**** in which the juvenile portion near the apex is coiled or cyrtoconic. The adult portion is straight or slightly sigmoidal and may be expanded...
- rapidly with a tendency to uncoil at maturity. Juvenile forms are somewhat cyrtoconic. The apical end forms a hook. Aipoceras has been found in Lower Mississippian...
- Dakeoceras is a genus of simple cyrtoconic ellesmeroceratid cephalopods in the fossil record. All known species come from the Lower Canadian epoch (Gasconadian)...
- order Nautilida characterized by rapidly expanding, smooth to ribbed, cyrtoconic to coiled s**** with rounded or sometimes dorsally flattened or impressed...
- than those found in species of living Nautilus, ranging from curved (cyrtoconic), through loosely coiled (gyroconic), to tightly coiled forms, represented...