The word "genus" refers to a category or group that contains similar species of plants, animals, or other living things. It is a way to classify and organize different organisms based on shared characteristics. Full definition
Approximately 3 million years ago, the ecosystems of North and South America were forever changed as dozens of genera of animals migrated between the two continents along the newly formed Isthmus of Panama in an event known as the Great American Biotic Interchange. (treehugger.com)
More species of birds have accumulated in genera inhabiting climatically stable areas. (sciencedaily.com)