Kamerunoceras is an extinct cephalopod genus belonging to the ammonite family Acanthoceratidae, found in Upper Cretaceous formations (Cenomanian to Turonian 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, previously of the Acanthoceratinae ibid, in the Euomphaloceratinae.[1] 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.[2]
Species
The following species of Kamerunoceras have been described:[3]
- 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),[4][5] Egypt, France, Mexico, Nigeria, Romania, Tunisia, United States (Arizona, New Mexico, Texas, Utah), Venezuela.[6]
References
- ^ Cooper, 1978
- ^ Arkell, 1957
- ^ Kamerunoceras species
- ^ Patarroyo & Rojas, 2007, pp.92-93
- ^ Patarroyo, 2016, p.41
- ^ Kamerunoceras at Fossilworks.org
Bibliography
- Arkell, W.J.; W.M. Furnish; Bernhard Kummel; A.K. Miller; R.C. Moore; O.H. Schindewolf; P.C. Sylvester-Bradley, and C.W. Wright. 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, 1-490. Part L; Geological Society of America and University of Kansas Press.
- Patarroyo, Pedro. 2016. Amonoideos y otros macrofósiles del lectoestratotipo de la Formación la Frontera, Turoniano inferior - medio (Cretácico Superior) en San Francisco, Cundinamarca (Colombia). Boletín de Geología, Universidad Industrial de Santander 38. 41-54. Accessed 2017-04-04.
- Patarroyo, Pedro, and Alexis Rojas. 2007. La sucesión y la fauna del Turoniano de la Formación San Rafael en Pesca y su comparación con la sección tipo en Samacá (Boyacá-Colombia-S.A.). Geología Colombiana, Universidad Nacional de Colombia 32. 89-96. Accessed 2017-04-05.)
Further reading
- W. A. Cobben and Hook, S. C. 1983 Mid-Cretaceous (Turonian) ammonite fauna from Fence Lake area of west-central New Mexico. Memoir 41, New Mexico Bureau of Mines & Mineral Resources, Socorro NM.
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