| Argillomys Temporal range:
| |
|---|---|
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Multituberculata |
| Genus: | †Argillomys |
| Species: | †A. marylandensis
|
| Binomial name | |
| †Argillomys marylandensis Cifelli et al., 2013
| |
Argillomys is an extinct genus of multituberculate mammal that lived in Maryland during the Aptian stage of the Early Cretaceous epoch.1
Description
Argillomys marylandensis, the type and only species, is distinguished by its unique combination of morphological traits on its second molar that include a tooth enamel ornamentation consisting of ribs and grooves only, a cusp formula of 2:4, the presence of a distinct cusp on the anterobuccal ridge, the enlargement of the second cusp of the buccal row, and central position of ultimate cusp in the lingual row.2
References
References
- "PBDB Taxon". Retrieved 4 January 2026.
- Cifelli, Richard Lawrence; Gordon, Cynthia L.; Lipka, Thomas R. (18 April 2013). Scott, Craig S. (ed.). "New multituberculate mammal from the Early Cretaceous of eastern North America". Canadian Journal of Earth Sciences. 50 (3): 315–323. doi:10.1139/e2012-051. ISSN 0008-4077. Retrieved 4 January 2026 – via Canadian Science Publishing.