# Lambdoceras

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***Lambdoceras*** is an extinct [genus](/source/Genus) of [Protoceratidae](/source/Protoceratidae) belonging to the order [Artiodactyla](/source/Artiodactyla) (subfamily [Synthetoceratinae](/source/Synthetoceratinae)) endemic to [North America](/source/North_America) during the [Miocene](/source/Miocene), living epoch 20.6—13.6 [Ma](/source/Annum), existing for approximately .[1]

## Taxonomy

A description of the genus *Lambdoceras* by [Ruben A. Stirton](/source/Ruben_A._Stirton) was published in 1967. It was synonymized subjectively with *[Prosynthetoceras](/source/Prosynthetoceras)* by Patton (1969), Patton and Taylor (1971) and Patton and Taylor (1973). It was assigned to [Protoceratidae](/source/Protoceratidae) by Stirton (1967), Tedford et al. (1987) and Albright (1999); and to [Synthetoceratini](/source/Synthetoceratini) by Webb (1981), Prothero (1998), Webb et al. (2003) and Prothero and Ludtke (2007).[2][3][4][5]

There are three species; the type *Lambdoceras hessei*, *L. siouxensis*, and *L. trinitiensis*.[6]

## References

1. [PaleoBiology Database: *Lambdoceras*, basic info](https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=42575)

1. R. A. Stirton. 1967. Relationships of the protoceratid artiodactyls, and description of a new genus. University of California Publications in Geological Sciences 72:1-43

1. T. H. Patton. 1969. Bulletin of the Florida State Museum 14(2)

1. T. H. Patton and B. E. Taylor. 1971. The Synthetoceratinae (Mammalia, Tylopoda, Protoceratidae). Bulletin of the American Museum of Natural History 145(2):119-218

1. D. R. Prothero and J. A. Ludtke. 2007. Family Protoceratidae. in D. R. Prothero and S. Foss (eds.), The Evolution of Artiodactyls 169-17

1. ["Fossilworks: Lambdoceras"](https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=42575). *[Paleobiology Database](/source/Paleobiology_Database)*. Retrieved 2024-01-23.

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