Steiromys

Steiromys; Temporal range: Miocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Parvorder:	Caviomorpha
Genus:	†Steiromys; Ameghino, 1887
Type species
	Steiromys detentus; Ameghino, 1887
Other species
	Steiromys duplicatus Ameghino, 1887 Steiromys intermedius Scott, 1905 Steiromys principalis Ameghino, 1901 Steiromys pseudonectus Bordas, 1939 Steiromys segregatus Ameghino, 1902

Steiromys is an extinct genus of caviomorph rodent that lived in South America during the Miocene epoch.

Taxonomy

Originally, the species Eosteiromys annectens was classified as a member of the genus Steiromys. However, detailed taxonomic study has moved the species to the genus Eosteiromys.

Palaeobiology

Locomotion

The foot morphology of Steiromys suggests it may have been scansorial.

References

↑ "PBDB Taxon". Retrieved 18 December 2025.
↑ Kramarz, Alejandro Gustavo (2004). "Octodontoids and erethizontoids (Rodentia, Hystricognathi) from the Pinturas Formation, Early - Middle Miocene of Patagonia, Argentina". Ameghiniana (in Spanish). 41 (2): 199–216. ISSN 1851-8044. Retrieved 18 December 2025 – via Ameghiniana.
↑ Candela, Adriana M.; Muñoz, Nahuel A.; García Esponda, César M.; Vizcaíno, Sergio F. (18 November 2024). "Evolutionary trends of caviomorph rodents as elucidated using their oldest foot anatomy". Papers in Palaeontology. 10 (6). doi:10.1002/spp2.1606. hdl:11336/268662. ISSN 2056-2799. Retrieved 18 December 2025 – via Wiley Online Library.

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[1] "PBDB Taxon". Retrieved 18 December 2025.

[2] Kramarz, Alejandro Gustavo (2004). "Octodontoids and erethizontoids (Rodentia, Hystricognathi) from the Pinturas Formation, Early - Middle Miocene of Patagonia, Argentina". Ameghiniana (in Spanish). 41 (2): 199–216. ISSN 1851-8044. Retrieved 18 December 2025 – via Ameghiniana.

[3] Candela, Adriana M.; Muñoz, Nahuel A.; García Esponda, César M.; Vizcaíno, Sergio F. (18 November 2024). "Evolutionary trends of caviomorph rodents as elucidated using their oldest foot anatomy". Papers in Palaeontology. 10 (6). doi:10.1002/spp2.1606. hdl:11336/268662. ISSN 2056-2799. Retrieved 18 December 2025 – via Wiley Online Library.