What is the largest type of ant?
Dinomyrmex
Dinomyrmex is a monotypic genus of ant containing the species Dinomyrmex gigas or giant forest ant. "D. gigas" is a large species of ant, native to Southeast Asian forests. It is one of the largest ants in existence, measuring in at for normal workers, and for the soldiers. Honeydew makes up 90% of their diet, but they will also consume insects and bird droppings. The ant is an effective forager, utilizing both efficient communication and recruitment. A handful of these ants may meet at night to engage in what has been observed to be ritual battle. These fights can continue for several months.
Nylanderia
"Nylanderia" is a large, ecologically important ant genus with a nearly cosmopolitan distribution. The ants are found in all geographic regions (with the exception of high-latitude areas), but is notably absent from Europe. Species inhabit a wide array of habitats from deserts to rainforests, although they reach their highest species diversity in forested and warmer environments. "Nylanderia" species are among the most abundant ant species in many places where they occur. For example, Ward (2000) found that "Nylanderia" (recorded as "Paratrechina") was the fifth-most frequently encountered ant genus in leaf-litter samples from around the world.