Definition of Falcoid. Meaning of Falcoid. Synonyms of Falcoid

- but also members of genera Protogrammoceras and Harpoceras. Ribs are falcoid and in small sizes of s**** are bifurcating, later they are single. On...
- and compressed. Whorl sides are flat and there is strong keel. Ribs are falcoid or falcate and thus biconcave, strong and projected. Sometimes, ribs can...
- umbilicus, arched to acute venter, and typically at some growth stage, falcoid ribs that spring in pairs from umbilical tubercles, usually disappearing...
- is elliptical, with rounded umbilical edge and sloping umbilical wall. Falcoid, or sinuous ribs are weak, or moderate on inner whorls, while on outer...
- in section. Inner whorls are smooth, outer mature whorl develops co**** falcoid ribs that arise near the umbilical rim but to not p**** over the rounded...
- Ammontida that may be keeled or unkeeled, tending to be oxyconic, with usually falcoid or falcate ribbing. The aptychi are paired and differ between families...
- s**** of which are typically oxycones with a tricarinate venter and falcoid ribbing, commonly divided by a median lateral groove or fillet. The median...
- convex, converge toward a narrowly ached venter. Inner whorls have sharp falcoid ribs, outer are smooth. Umbilical tubercles are lacking. Similar related...
- of oppeliids from the Middle and Upper Jur****ic typically with strong falcoid or falcate ribbing that covers whorl sides completely. Venters are usually...
- tricarinate; with sutures in great variety, but ribbing usually more or less falcoid or falcate. The Oppeliidae is the prin****l family of the Haploceratoidea...