''Acompsoceras'' is an extinct genus of cephalopod belonging to the

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 cuttle ...

subclass. It grew to a large size compared to most ammonites. Its shell reached in diameter when the animal reached adulthood. ''Acompsoceras'' appears in the fossil record during the early portion of the Cretaceous Cenomanian stage and goes extinct around the middle of that same stage.

Species

''Acompsoceras'' is in the same family as '' Acanthoceras'', the

Acanthoceratidae Acanthoceratidae is an extinct family of acanthoceratoid cephalopods in the order Ammonitida, known from the Upper Cretaceous. The type genus is '' Acanthoceras''. Diagnosis Acanthoceratidae species are strongly tuberculate with at least umbil ...

, and contains several species: * ''A. amphibolum'' * ''A. calabarense'' * ''A. essendiense'' * ''A. inconstans'' * ''A. renevieri''

Distribution

Fossils of ''Acompsoceras'' have been found in Brazil, Colombia (

Hiló Formation The Hiló Formation ( es, Formación Hiló, Kih) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The predominantly shale formation dates to the Middle Cretaceous period; Late Albian to Early Cenom ...

), Germany, Madagascar, Nigeria, the United Kingdom and Texas.''Acompsoceras''
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was cre ...

.org

References

Cretaceous ammonites Acanthoceratidae Ammonitida genera Ammonites of South America Cretaceous Colombia Albian life Cenomanian life {{Ammonitina-stub