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Cieneguiticeras, a new genus of Tithonian oppeliids (Ammonoidea, Late Jurassic) |
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| Authors: | Horacio Parent,Ryszard Myczyński,Gü nter Schweigert |
| Affiliation: | a Universidad Nacional de Rosario (FCEIA-IFG), Laboratorio de Paleontología, Pellegrini 250, 2000 Rosario, Argentina b Institute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland c Hewenstrasse 9, 78194 Immendingen-Hattingen, Germany d Staatliches Museum für Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany |
| Abstract: | The new genus Cieneguiticeras, assigned to the family Oppeliidae, is described on the basis of Andean lower-middle Tithonian ammonites from Arroyo Cieneguita, west-central part of the Neuquén-Mendoza Basin, Argentina. The macroconchs are closely homoeomorphic with Neochetoceras Spath and the microconchs have a ‘glochiceratid’-type morphology. The stratigraphic range of Cieneguiticeras nov. gen. includes the lower and middle Tithonian by means of a succession of two or three species which are interpreted as members of a phyletic lineage. Ammonites from the Tithonian of Cuba, Mexico and France are more or less confidently included in this new genus. |
| Keywords: | Ammonoidea Oppeliidae Cieneguiticeras nov. gen. Tithonian Neuqué n-Mendoza Basin Argentina |
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