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 Codazziceras scheibei and another described species is C. ospinae. Fossils of Codazziceras have been found in the La Frontera Formation of Huila, Cundinamarca and Boyacá, and in the Loma Gorda Formation of Aipe, Huila.

Etymology

The genus is named after Italian-Colombian geographer Agustín Codazzi.

Description

The shell is rather evolute, ornamented with ribs and clavate tubercles. Ribs are fairly strong on the flanks but weaken as they cross the venter. Whorl section is compressed, moderately embracing, flanks convex, venter moderately flattened with three rows of tubercles that tend to be elongate in the direction of coiling.

References

Bibliography

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. 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). Boletín de Geología, Universidad Nacional de Colombia 33. 69-92. Accessed 2017-03-30.

Further reading

• F. Etayo Serna, 1979. Zonation of the Cretaceous of central Colombia by ammonites. Publicaciones Geologicas Especiales del Ingeominas 2:1-188

1. Conejo Formation
2. List of fossiliferous stratigraphic units in Colombia
3. Aipe
4. La Frontera Formation
5. Loma Gorda Formation
6. Euomphaloceratinae