pygmy rice rat Directory References Discover Timeline of the 2000s What Is the Emoluments Clause? 7 Drugs that Changed the World Why Do Some Cicadas Appear Only Every 17 Years? Who Invented the Internet? Falling Stars: 10 of the Most Famous Endangered Species 9 Memorials and Monuments in the United States Contents pygmy rice rat rodent Ask the Chatbot a Question Ask the Chatbot a Question Also known as: Oligoryzomys Learn about this topic in these articles:classification of rice rat In rice rat…small rice rats (Microryzomys), and pygmy rice rats (Oligoryzomys), among others. All belong to the subfamily Sigmodontinae of the “true” mouse and rat family Muridae within the order Rodentia.Read More