# Mammites

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***Mammites*** is a [Late Cretaceous](/source/Late_Cretaceous) ([Cenomanian](/source/Cenomanian) to [Turonian](/source/Turonian)) ammonite genus included in the acanthoceratoidean family, [Acanthoceratidae](/source/Acanthoceratidae), and the type genus for the subfamily [Mammitinae](/source/Mammitinae). *Mammites* was named by Laube and Bruder in 1887.[1][2]

## Species

Species within the genus *Mammites* include:[2]

- *M. mohavanensis* Böse, 1923 - found at Loma el Macho, Coahuila, Mexico
- *M. mutabilis* Reyment, 1955 - known from Cameroon
- *M. nodosoides* Schlüter, 1871 - found in North and South America, Africa and Europe
- *M. powelli* Kennedy *et al.*, 1987 - found in Texas and Colombia
- *M. rancheriae* Anderson, 1958 - known from the North American Pacific region

## 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](/source/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 [Late Cretaceous](/source/Late_Cretaceous) formations of Angola, Brazil, Cameroon, Colombia ([La Frontera](/source/La_Frontera_Formation), [Boyacá](/source/Boyac%C3%A1_Department), [Cundinamarca](/source/Cundinamarca_Department) and [Huila](/source/Huila_Department)) and [San Rafael Formations](/source/San_Rafael_Formation,_Colombia),[3][4] Egypt, France, India, Madagascar, Mexico, Nigeria, Peru, Romania, Tunisia, United States and Venezuela.[2]

## Palaeoecology

Bite traces on a Turonian-aged [specimen](/source/Biological_specimen) of *M. nodosoides* from [Czechia](/source/Czech_Republic) indicate that the individual experienced a fatal predatory attack by a [mosasauroid](/source/Mosasauroidea).[5]

## References

1. [Sepkoski Online](http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class)

1. [*Mammites*](https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15154) at [Fossilworks](/source/Fossilworks).org

1. Patarroyo, 2016, p.41

1. Patarroyo & Rojas, 2007, pp.92-93

1. Mazuch, Martin; Košťák, Martin; Mikuláš, Radek; Culka, Adam; Kohout, Ondřej; Jagt, John W. M. (January 2024). ["Bite traces of a large, mosasaur-type(?) vertebrate predator in the lower Turonian ammonite Mammites nodosoides (Schlüter, 1871) from the Czech Republic"](https://www.sciencedirect.com/science/article/abs/pii/S0195667123002422?via%3Dihub). *[Cretaceous Research](/source/Cretaceous_Research)*. **153**. [doi:10.1016/j.cretres.2023.105714](https://doi.org/10.1016/j.cretres.2023.105714). Retrieved 18 August 2025. – via Elsevier Science Direct.

### 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)"](http://www.scielo.org.co/pdf/boge/v38n3/v38n3a03.pdf), *Boletín de Geología, Universidad Industrial de Santander*. **38**: 41–54, retrieved 2017-04-04
- Patarroyo, Pedro & Rojas, Alexis (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.)"](http://www.bdigital.unal.edu.co/32498/1/32029-117388-1-PB.pdf), *Geología Colombiana, Universidad Nacional de Colombia*. **32**: 89–96, [archived](https://web.archive.org/web/20170419110445/http://www.bdigital.unal.edu.co/32498/1/32029-117388-1-PB.pdf) 2017-04-19 at the Wayback Machine, retrieved 2017-04-05)

## Further reading

- Arkell, W.J.; Furnish, W.M.; Kummel, Bernhard; Miller, A.K.; Moore, R.C.; Schindewolf, O.H.; Sylvester-Bradley, P.C.; Wright, C.W. (1957), "Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology", Vol. Part L, [Geological Society of America](/source/Geological_Society_of_America) and [University of Kansas](/source/University_of_Kansas) Press, pp. 1–490
- W.A. Cobban & 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.
- W.A. Cobban & Hook, S.C. (1979). "*Collignoniceras woollgari woollgari* (Mantell) ammonite fauna from Upper Cretaceous of Western Interior, United States". *Memoir*. **38**. New Mexico Bureau of Mines & Mineral Resources, Socorro NM.

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Adapted from the Wikipedia article [Mammites](https://en.wikipedia.org/wiki/Mammites) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Mammites?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.