Inside the bill, adult platypuses do not have true teeth but instead have developed flat pads of hardened gum tissue. Male platypuses have a spur on the inner side of each ankle that is connected to a venom gland located over the thighs. Adult platypuses do not have teeth. Teeth are not necessary for platypuses, as they "chew" their food by grinding it between horny plates on their upper and lower jaws. When a baby platypus .
Jan 20, · An adult platypus has no teeth; instead, it chews by grinding its food between two bony grinding plates on its upper and lower jaws. • What is a Monotreme? The duck-billed platypus's eyes and ears are located in grooves just behind its bill. Each groove acts like a pair of large eyelids. The adult platypus (Ornithorhynchus) bears no teeth. In marsupials the milk dentition persists except the last premolar. In adult marsupials the number of incisors in upper and lower jaws always vary except in burrowing wombats (Phascolomys). Kangaroo (Macropus) / = 10/7 = 17 × 2 =