They are sometimes also called broad-footed marsupial mice, pouched mice, route rat and/or Antechinus shrews. Emin's pouched rats are actually better climbers than their better known Gambian pouched rat cousins. The second subclass is divided into two infraclasses&colon; pouched mammals (the marsupials) and placental mammals. However, other species, notably the Gambian pouched rat, have been trained to assist humans. However, other species, notably the Gambian pouched rat, have also been trained to assist humans. Marsupials are an infraclass of pouched mammals that was once more widely distributed. Marsupials are a collection of pouched mammals that was once more widely distributed. The giant pouched rats (genus Cricetomys) of sub-Saharan Africa are large muroid rodents. Ben, in the 2003 remake of "Willard", was a Gambian pouched rat. The name "pouched rat" refers to their large cheek pouches. The southern giant pouched rat is a large rodent, with males larger than females. Females with pouched joeys had been found between June and December. Giant pouched rats from East Africa to detect landmines. The pouched frog ("Assa darlingtoni") has pouches on the sides of its body. The trained pouched rats are called HeroRATS.