''Crioceratites'' is an

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 ...

genus from the

Early Cretaceous The Early Cretaceous (geochronological name) or the Lower Cretaceous ( chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pr ...

belonging to the

Ancyloceratoidea Ancyloceratoidea, formerly Ancylocerataceae, is a superfamily of typically uncoiled and loosely coiled heteromorph ammonoids established by Alpheus Hyatt in 1900, that may contain as many as 11 families, depending on the classification accepted ...

. ''Crioceratites'' was formerly included in the Ancyloceratidae, in the subfamily Crioceratinae which was subsequently elevated in rank to the family Crioceratidae. ''Crioceras'' and ''Toxoceras'' d'Orbigny and possibly '' Emericiceras'' Sarka 1954 are junior synonyms.

Species

Species within the genus ''Crioceratites'' include:Klein, J. et al. FOSSILIUM CATALOGUS I:ANIMALIA Pars 144, Lower Cretaceous Ammonites III Bochianitoidea, Protancyloceratoidea, Ancyloceratoidea, Ptychoceratoidea, 2007. *''C. anglesensis'' Sarkar, 1955 *''C. anglesensis'' non Sarkar Thomel, 1965 *''C. angulatus'' Torcapel, 1884 - ''

nomen dubium In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a s ...

'' *''C. arci'' Dimitrova, 1967 *''C. arkelli'' Sarkar, 1955 *''C. baylei'' Sarkar, 1955 *''C. barrabei'' Sarkar, 1955 *''C. bispinatus'' Reynés, 1876 - ''nomen dubium'' *''C. bituberculatus'' D'Orbigny, 1842 - ''nomen dubium'' *''C. coniferus'' Busnardo in Busnardo et al., 2003 *''C. curnieri'' Ropolo, 1992 *?''C. delessei'' Reynés, 1876 *''C. duvalii'' Léveillé, 1837 *''C. gagarini'' Dimitrova, 1967 *''C. heterocostatus'' Mandov, 1976 *''C. hildiensiformis'' Roch, 1930 *''C. inermis'' Sarkar, 1955 *''C. irregularis'' Dimitrova, 1967 *''C. karakaschi'' Sarkar, 1955 *''C. koechliniformis'' Sarkar, 1955 *''C. krenkeli'' Sarkar, 1955 *''C. lorioli'' Matheron, 1880 *''C. loryi'' Sarkar, 1955 *''C. mandovi'' Avram, 1995 *''C. matsumotoi'' Sarkar, 1955 *?''C. monotuberculatus'' Avram, 2002 - ''

nomen nudum In taxonomy, a ''nomen nudum'' ('naked name'; plural ''nomina nuda'') is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published with an adequate des ...

'' *''C. monsalvensis'' Etayo-Serna, 1968 *?''C. mundum'' Renngarten, 1951 - ''nomen nudum'' *''C. panescorii'' Astier, 1851 - ''nomen dubium'' *''C. piveteaui'' Sarkar, 1955 *?''C. portarum'' Etayo-Serna, 1968 *''C. primitivus'' Reboulet, 1996 *''C. ramkrishnai'' Sarkar, 1955 *''C. rodighieri'' Dimitrova, 1967 *''C. sahnii'' Sarkar, 1955 *''C. schindewolfi'' Sarkar, 1955 *''C. shibaae'' Sarkar, 1955 *''C. shibaniae'' Sarkar, 1955 *''C. sinzowi'' Karakasch, 1907 *''C. sornayi'' Sarkar, 1955 *''C. stahleckeri'' Sarkar, 1955 *''C. tehamaensis'' Anderson, 1938 *?''C. tenuilobatus'' von Koenen, 1902 *''C. vialii'' Sarkar, 1955 *''C. villiersianus'' D'Orbigny, 1842 *''C. vishnui'' Sarkar, 1955

Description

''Crioceratites'' is coiled in an open, normally equiangular spiral with an oval or subquadrate whorl section. The surface is banded by fine, dense, rounded ribbing sectioned by periodically spaced thick and often spinose ribs.

Distribution

''Crioceratites'' fossils have been found in

Lower Cretaceous Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Gloucestershire, England See also *Nizhny Nizhny (russian: Ни́жний; masculine), Nizhnyaya (; feminine), or Nizhneye (russian: Ни́� ...

Valanginian-Barremanian, sediments in Europe, Africa, Asia, North America and South America;

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, t ...

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the eas ...

and Colombia (

Paja Formation Paja may refer to: * Paja, Iran, a village in Sari County * Paja (given name), a Serbian masculine name * Paja (surname) * Paja Formation, geologic formation in Colombia * Paja Brava :''Paja Brava is also used in Spanish speaking countries to ref ...

Species

Description

Distribution

References

Further reading