Introducing mammals
Introducing mammals

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

Introducing mammals

2.1.1 Monotremes

Monotremes diverged from the main group of early mammals in the Lower Jurassic period. There are only five species living today, of which four are echidnas. You will discover more about monotremes in Section 3.

Described image
Figure 5 A duck-billed platypus, Ornithorhynchus anatinus (Tasmania, Australia)
Described image
Figure 6 Short-beaked echidna, Tachyglossus aculeatus
Described image
Figure 7 Eastern long-beaked echidna, Zaglossus bartoni (Papua New Guinea)
s182_12M

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371