In male echidna there are nine sex chromosomes while platypus has an even 10. The male echidna has five X chromosomes, but only four Y chromosomes, whereas the male platypus has five X and five Y).

The short-beaked echidna (Tachyglossus aculeatus) is one of Australia's most iconic animals. Belonging to a unique group of mammals called "monotremes" (with the platypus as the other prominent ...

This meant that certain distinguishing features, such as mammary glands, were not obvious. The platypus was ultimately placed into a new order called Monotremata, alongside the four living species of ...

Other monotremes also have developed the ability to electrolocate, but the platypus is the best at it among the monotremes. While the echidna species has 400 to 2,000 electroreceptor skin cells ...

Furthermore, there are also differences between the two monotreme groups that separates the echidnas and from the platypus families. In male echidna there are nine sex chromosomes while platypus ...

The echidna — also known as Sir David's long ... This group also includes the platypus. The spiny critters are notoriously difficult to find since they're nocturnal and tend to be shy.

The cloacal animals - the platypus and the echidna - are often overshadowed. However, fossil finds now show that these animals probably played a much more prominent role 100 million years ago and ...