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Quitmaniceras

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Quitmaniceras
Temporal range: Late Cretaceous (early Turonian)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Acanthoceratidae
Subfamily: Acanthoceratinae
Genus: Quitmaniceras
Powell, 1963
Species
  • See text

Quitmaniceras is a genus of small, compressed, fairly evolute ammonites from the lower Turonian of Grant County, New Mexico and Trans-Pecos Texas, included in the subfamily Acanthoceratinae. The shell has a carinate venter in juveniles and one that is arched in adults, usually with a raised siphonal line,(siphonal referring to the marginal siphuncle). Ribs are very weak to moderately strong, flexious, typically sloping forward toward the rim, bending further forward at the outer shoulder.

Distribution

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Fossils of Quitmaniceras have been found in Colombia (Loma Gorda Formation, Aipe, Huila),[1] Mexico and the United States (Arizona and Texas).[2]

References

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  1. ^ Patarroyo, 2011, p.69
  2. ^ Quitmaniceras at Fossilworks.org

Bibliography

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  • Patarroyo, Pedro (2011), "Sucesión de Amonitas del Cretácico Superior (Cenomaniano-Coniaciano) de la parte más alta de la Formación Hondita y de la Formación Loma Gorda en la Quebrada Bambucá, Aipe - Huila (Colombia)" (PDF), Boletín de Geología, Universidad Nacional de Colombia, 33: 69–92, retrieved 2017-03-30

Further reading

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  • W.A. Cobban, S.C. Hook & W.J.Kennedy, 1989. Upper Cretaceous rocks and ammonite faunas of southwestern New Mexico, Memoir 45, New Mexico Bureau of Mines & Mineral Resources