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...
- embryonic s****. Bactritida (Erben 1964) are characterized by orthoconic to cyrtoconic s**** that may be long or short with a narrow siphuncle invariably in...
- Middle Silurian to the Late Devonian. The phragmocone of Wadeoceras is cyrtoconic (curved) and the living chamber, more orthoconic (straight). Walter C...
- some even tiny, laterally compressed, curved (cyrtoconic) or straight (orthoconic). Most cyrtoconic forms are endogastric, with the ventral side longitudinally...
- than those found in species of living Nautilus, ranging from curved (cyrtoconic), through loosely coiled (gyroconic), to tightly coiled forms, represented...
- 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...
- Galtoceras is a cyrtoconic nautiloid from the Middle Silurian of North America, named by Foerste in 1934. Galtoceras is genus of the Oncocerida and of...
- Osbornoceras is a genus of Lower Silurian cyrtoconic nautiloid cephalopods known from Ohio and possibly Manitoba, one of five general currently included...
- Members of this subclass usually have orthoconic (straight) to slightly cyrtoconic (curved) s****, and central to subcentral siphuncles which may bear internal...
- (external s****) shape is slender, usually orthoconic (straight) or weakly cyrtoconic (slightly curved). The monophyly of Riocerida as a unique group is plausible...