| Hypogeomys australis Temporal range: Holocene
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|---|---|
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| Left maxilla (upper jaw) from Andrahomana | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Nesomyidae |
| Genus: | Hypogeomys |
| Species: | †H. australis
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| Binomial name | |
| †Hypogeomys australis G. Grandidier, 1903
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Hypogeomys australis is an extinct rodent from central and southeastern Madagascar. First described in 1903, it is larger than its close relative, the living Hypogeomys antimena, which occurs further west, but otherwise similar. Average length of the femur (upper leg bone) is 72.1 mm, compared to 63.8 mm in H. antimena. One of the few extinct rodents of Madagascar, it survived to at least around 1536 BP based on radiocarbon dating. Little is known of its ecology, but it may have lived in burrows like its living relative and eaten some arid-adapted plants.
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