''Kamerunoceras'' is an extinct

cephalopod A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head ...

genus 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 cuttlefish) ...

family

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 ...

, found in

Upper Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

formations (

Cenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...

Turonian The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded by t ...

age) of Africa, Europe and North and South America.

Description

''Kamerunoceras'', named by R.A. Reyment in 1954, was tentatively included in the acanthoceratid subfamily Mammitinae in W.J. Arkell, ''et al'' (1957), but has since been combined with ''

Euomphaloceras ''Euomphaloceras'' is an early Upper Cretaceous ammonite genus, (Cephalopoda, Ammonoidea), included in the Acanthoceratinae until established as the type genus for the Euomphaloceratinae Euomphaloceratinae is a subfamily of Upper Cretaceous am ...

'', previously of 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 ...

''ibid'', in the

Euomphaloceratinae Euomphaloceratinae is a subfamily of Upper Cretaceous ammonites included in the Acanthoceratidae, characterized by generally evolute shells with quadrate whorl sections that are strongly ribbed. Sutures are ammonitic, but not overly complex. Gen ...

.Cooper, 1978 ''Kamerunoceras'' is described as being very evolute with a rectangular whorl section and umbilical tubercles only in the middle growth section. Ventrolateral tubercles, found mostly throughout, are spinose. Ribs are irregular, straight at first, becoming denser and sigmoid on the outer whorl.Arkell, 1957

Species

The following species of ''Kamerunoceras'' have been described:''Kamerunoceras'' species
/ref> * ''K. andinum'' Renz, 1982 * ''K. antsaronense'' Collignon, 1965 * ''K. calvertense'' Powell, 1963 * ''K. douvillei'' (Pervinquière, 1907) * ''K. eschii'' (Solger, 1904) * ''K. ganuzai'' Wiedmann, 1960 * ''K. inaequicostatus'' Wiedmann, 1960 * ''K. isovokyense'' Collignon, 1965 * ''K. lecointrei'' Collignon, 1966 * ''K. puebloense'' Cobban & Scott, 1972 * ''K. salmuriensis'' Courtiller, 1867 * ''K. schindewolfi'' Collignon, 1965 * ''K. tinrhertense'' Collignon, 1965 * ''K. turoniense'' D'Orbigny, 1850

Distribution

Fossils of ''Kamerunoceras'' have been found in Austria, Brazil, Cameroon, Colombia ( La Frontera and San Rafael Formations),Patarroyo & Rojas, 2007, pp.92-93Patarroyo, 2016, p.41 Egypt, France, Mexico, Nigeria, Romania, Tunisia, United States (Arizona, New Mexico, Texas, Utah), Venezuela.''Kamerunoceras''
at

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.org

References

Bibliography

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Description

Species

Distribution

References

Bibliography

Further reading