| Zalambdalestes Temporal range:
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| Zalambdalestes lechei skull and lower jaw, Museum of Evolution Warsaw. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | incertae sedis |
| Family: | †Zalambdalestidae |
| Genus: | †Zalambdalestes Gregory & Simpson, 1926 |
| Species | |
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Zalambdalestes (meaning much-like-lambda robber) is an extinct genus of eutherian mammal known from the Upper Cretaceous in Mongolia.
Zalambdalestes was a hopping animal with a long snout, long teeth, a small brain and large eyes. It was about 20 centimetres (7.9 in) long, with a head only 5 centimetres (2 in) long. It had strong front paws and even stronger rear ones, sharing specializations to saltation similar to those of modern rabbits.[1][2] It was most likely not a placental due to the presence of an epipubic bone,[3][1]
Its diet was probably composed mainly of insects that it hunted in the forest undergrowth using its sharp, interlocking teeth.[4] Unlike modern placental mammals, Zalambdalestes had an epipubic bone, meaning it was probably restricted reproductively in the same way as modern monotremes and marsupials.[1]
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