Euomphaloceratinae is a subfamily of Upper Cretaceous

ammonites 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) ...

included in 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 ...

, characterized by generally evolute shells with quadrate whorl sections that are strongly ribbed. Sutures are ammonitic, but not overly complex. Genera include: *'' Burroceras'' *''

Codazziceras ''Codazziceras'' is an early Late Cretaceous ammonite from the Late Cretaceous of Colombia, distinguished from ''Lyelliceras'' (Lyelliceratidae) from which it is based and added to the Euomphaloceratinae (Acanthoceratidae). The type species is '' ...

'' *'' Euomphaloceras'', (type genus) *'' Hourcqiceras'' *'' Kamerunoceras'' *'' Lotzeites'' *''

Morrowites ''Morrowites'', named by Cobban and Hook, 1983, is a moderate to large-sized ammonite with quadrangular to depressed whorls, broadly rounded to depressed venter, low ribs, umbilical and inner and outer ventrolateral tubercles and smooth early who ...

'' *'' Paraburroceras'' *'' Paramammites'' *'' Pseudaspidoceras'' *'' Romaniceras'' *'' Shuparoceras'' some of which have been removed from other taxa where originally placed. ''Euomphaloceras'', the type genus of the subfamily, was removed from the

Acanthoceratinae The Acanthoceratinae comprise a subfamily of ammonoid cephalopods that lived during the Late Cretaceous from the latter early Cenomanian to the late Turonian Shells are evolute, tuberculate and ribbed, with subquadrate to squarish whorl sectio ...

sensu Arkell et al. 1957, ''Kamarunoceras'' and ''Pseuaspidoceras'' from the

Mammitinae Mammitinae comprises a subfamily within the Acanthoceratidae (Ammonoidea) characterized by moderately to very evolute shells with rectangular to squarish whorl sections along with blunt umbilical and prominent inner and outer ventrolateral tuberc ...

, sensu Arkell et al. 1957. Others were added since initial publication of the

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

in 1957.

References

* W.C. Arkell ''et al.'', 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America and University of Kansas Press. * Cyril Baudoui
Taxonomique Ammonites
Ammonites et autres fossile

* Euomphaloceratinae

i

Acanthoceratidae Cenomanian first appearances Coniacian extinctions Prehistoric animal subfamilies {{cretaceous-animal-stub