Here's a breakdown:

* Species: A group of organisms that can interbreed and produce fertile offspring.

* Genus: A taxonomic rank below family and above species. It groups together species that share a common ancestor and are closely related.

For example:

* Panthera is a genus that includes the lion, tiger, leopard, and jaguar.

* Canis is a genus that includes the wolf, dog, coyote, and jackal.

Think of it like a family tree. Species are like individual cousins, and a genus is like the family branch they all belong to.