''Cadomites'' is an extinct

ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

genus from the superfamily Stephanoceratoidea that lived during the

Middle Jurassic The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174.1 to 163.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relatively rare, but geological formations co ...

(upper Bajocian – lower Callovian).

Description

''Cadomites'' is directly descended from ''

Stephanoceras ''Stephanoceras'' (meaning ''crown horn'') is an extinct genus of Stephanoceratoid ammonite which lived during the Bajocian (Middle Jurassic). It is the type genus of the family Stephanoceratidae. Type species ''Ammonites humphriesianum'' J ...

'', with a similar collared and lipped aperture rim, but has denser, finer, sharper ribbing. The shell is discoidal, evolute, with a wide umbilicus. The suture is complex.

Distribution

Fossils of species within this genus have been found in the

sediments in Europe, Africa and South Asia.

References

Bibliography

* '' Treatise on Invertebrate Paleontology'', Part L, Ammonoidea, -Stephanocerataceae; Geological Society of America, 1957, reprinted 1990

External links

Ammonites.fr: Ammonites website
Middle Jurassic ammonites Middle Jurassic ammonites of Europe Ammonites of Africa Jurassic animals of Africa Middle Jurassic Africa Middle Jurassic ammonites of Asia {{ammonite-stub