duck-billed platypus (Ornithorhynchus anatinus) Dentition of a platypus
Date 1849
Source Volume 1 of Sketches in Natural History: History of the Mammalia
Author Charles Knight
Source: https://commons.wikimedia.org/wiki/File:Animaldentition_ornithoryncusanatinus.png
The platypus or duck-billed platypus (Ornithorhynchus anatinus) is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. It is one of the extant species of monotremes, the only mammals that lay eggs instead of giving birth.