Trechinae

Trechinae is a subfamily of ground beetles belonging to the family Carabidae. This subfamily is characterized by its diverse range of species, which are found worldwide, with the highest diversity in tropical regions. The subfamily includes over 2,000 species, with many being small to medium-sized beetles. Trechinae are known for their distinctive features, such as the presence of a single tooth on the mandibles, which is unique among ground beetles. They are also notable for their diverse feeding habits, including carnivorous, omnivorous, and even some species that are known to feed on fungi.

The subfamily Trechinae is further divided into several tribes, each with its own unique characteristics. For example, the tribe Trechini includes species that are often found in grasslands and open habitats, while the tribe Trechoblatini is known for its species that are often found in forests and other shaded environments. Despite their diversity, Trechinae share several common traits, such as their ability to roll into a ball when threatened, a behavior known as balling.

Trechinae play an important role in their ecosystems, serving as both predators and prey. As predators, they help control populations of other insects, while as prey, they provide food for a variety of other animals. Despite their ecological importance, many species of Trechinae are threatened by habitat loss and other environmental factors. Conservation efforts are underway to protect these important beetles and their habitats.