Shaw Mayer's water rat
| Shaw Mayer's water rat | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Rodentia | 
| Family: | Muridae | 
| Genus: | Baiyankamys | 
| Species: | B. shawmayeri  | 
| Binomial name | |
| Baiyankamys shawmayeri Hinton, 1943  | |
| Synonyms | |
| 
 Hydromys shawmayeri  | |
Shaw Mayer's water rat (Baiyankamys shawmayeri) is a semiaquatic species of rodent in the family Muridae. It is found in the mountains of Papua New Guinea.