Issiodoromys

Issiodoromys; Temporal range: Early Oligocene–Late Oligocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	†Theridomyidae
Genus:	†Issiodoromys; Bravard, 1852
Species
	Issiodoromys balmensis Mayo, 1987; Issiodoromys limognensis Schmidt-Kittler and Vianey-Liaud, 1987; Issiodoromys medius Vianey-Liaud, 1976; Issiodoromys minor Filhol, 1876; Issiodoromys pauffiensis Vianey-Liaud, 1976;

Issiodoromys is an extinct genus of theridomyid rodent that lived in Europe during the Rupelian and Chattian stages of the Oligocene epoch.

Distribution

Issiodoromys minor is known from France, Switzerland, and Spain. Issiodoromys medius is known only from France and Switzerland. Issiodoromys limognensis is known only from France and Spain. Issiodoromys balmensis is known only from Switzerland. Issiodoromys pauffiensis is known only from France.

Palaeobiology

Based on its low mandibular condyle, the flatness of its molar occlusal surface, and the posterior orientation of the pterygoid and masseter, Issiodoromys likely exhibited a chewing pattern that was slightly oblique to propalinal.

References

↑ "Issiodoromys". Paleobiology Database. Retrieved 14 August 2026.
1 2 "Issiodoromys minor". Paleobiology Database. Retrieved 14 August 2026.
↑ Kälin, Daniel (20 November 2013). "A new Oligocene (MP 24) mammal fauna (Dürrenberg, Canton Jura, NW Switzerland) from the eastern slope of the "Rauracian depression"". Swiss Journal of Geosciences. 106 (2): 207–218. doi:10.1007/s00015-013-0141-9. ISSN 1661-8726. Retrieved 14 August 2026 – via Springer Nature Link.
↑ "Issiodoromys medius". Paleobiology Database. Retrieved 14 August 2026.
↑ "Issiodoromys limognensis". Paleobiology Database. Retrieved 14 August 2026.
↑ "Issiodoromys balmensis". Paleobiology Database. Retrieved 14 August 2026.
↑ "Issiodoromys pauffiensis". Paleobiology Database. Retrieved 14 August 2026.
↑ Hautier, Lionel; Clavel, Julien; Lazzari, Vincent; Rodrigues, Helder Gomes; Vianey-Liaud, Monique (1 January 2010). "BIOMECHANICAL CHANGES AND REMODELING OF THE MASTICATORY APPARATUS DURING MAMMALIAN EVOLUTION: THE CASE OF THE ISSIODOROMYINAE (RODENTIA)". PALAIOS. 25 (1): 6–13. doi:10.2110/palo.2009.p09-047r. ISSN 1938-5323. Retrieved 14 September 2026 – via GeoScienceWorld.

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[Issiodoromys-1] "Issiodoromys". Paleobiology Database. Retrieved 14 August 2026.

[IssiodoromysMinor-2] 1 2 "Issiodoromys minor". Paleobiology Database. Retrieved 14 August 2026.

[3] Kälin, Daniel (20 November 2013). "A new Oligocene (MP 24) mammal fauna (Dürrenberg, Canton Jura, NW Switzerland) from the eastern slope of the "Rauracian depression"". Swiss Journal of Geosciences. 106 (2): 207–218. doi:10.1007/s00015-013-0141-9. ISSN 1661-8726. Retrieved 14 August 2026 – via Springer Nature Link.

[4] "Issiodoromys medius". Paleobiology Database. Retrieved 14 August 2026.

[5] "Issiodoromys limognensis". Paleobiology Database. Retrieved 14 August 2026.

[6] "Issiodoromys balmensis". Paleobiology Database. Retrieved 14 August 2026.

[IssiodoromysPauffiensis-7] "Issiodoromys pauffiensis". Paleobiology Database. Retrieved 14 August 2026.

[8] Hautier, Lionel; Clavel, Julien; Lazzari, Vincent; Rodrigues, Helder Gomes; Vianey-Liaud, Monique (1 January 2010). "BIOMECHANICAL CHANGES AND REMODELING OF THE MASTICATORY APPARATUS DURING MAMMALIAN EVOLUTION: THE CASE OF THE ISSIODOROMYINAE (RODENTIA)". PALAIOS. 25 (1): 6–13. doi:10.2110/palo.2009.p09-047r. ISSN 1938-5323. Retrieved 14 September 2026 – via GeoScienceWorld.