Superfamily Acanthoceratoidea Rank Genus Subclass Ammonites | ||
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Similar Ammonites, Collignoniceras, Fagesia, Calycoceras, Vascoceras | ||
Mammites et cellules m me combat
Mammites is an Upper Cretaceous ammonite genus included in the acanthoceratoidean family, Acanthoceratidae, and the type genus for the subfamily Mammitinae. Mammites, which is restricted to the Turonian (99.7 to 89.3 Ma), was named by Laube and Bruder in 1887.
Contents
- Mammites et cellules m me combat
- Ma triser les mammites c est possible
- Species
- Description
- Distribution
- References
Ma triser les mammites c est possible
Species
Species within the genus Mammites include:
Description
Shells of Mammites are typically stout, usually with a rectangular or squarish whorl section and flattish to slightly concave venter and can reach a diameter of 15–20 millimeters (0.59–0.79 in). Ornamentation is dominated by strong umbilical tubercles and moderate inner and outer ventrolateral tubercles. Ribs are somewhat prominent in juveniles stages but tend to become inconspicuous in the adult. The suture is ammonitic but rather simple. Some species, those with broad first lateral lobes in the suture, have been reassigned to Morrowites
Mammites and Morrowites are rather similar except that Mammites as redefined has a narrow first later lobe while that in Morrowites is broad and the early whorls in Morrowites are smooth except for widely spaced ribs and constrictions while those in Mammites have normal ribs and tubercles.
Distribution
Fossils of species within this genus have been found in the Cretaceous sediments of Angola, Brazil, Cameroon, Colombia, Egypt, France, India, Madagascar, Mexico, Nigeria, Peru, Romania, Tunisia, United States and Venezuela.
