There are many animals that are not classed as mammals or reptiles.
firstly, you have the entire invertebrates group. for example Spiders and insects.
secondly, you have the vertebrates that are not mammals or reptiles, for example, birds and fish.
but if you are wondering the name that incorporates the platypus and echidna, then they are called Monotremes
Is a crab a reptile or a mammal
is a caribou a reptile or a mammal
mammal
a snake is a reptile a bat is a mammal
Reptile
Reptile
It is a bird, neither mammal or reptile.
Mammal
Mammal.
A leopard is a mammal.
A fly is not a mammal, reptile, or amphibian. A fly is an insect.
The platypus is not a reptile - it is an egg-laying mammal.