Titan beetle (Titanus giganteus) is widely rated as the largest insect in the world. With the largest reliable measured specimen being 16.7 cm (6.6 in) in length (though several 18+ cm specimens are reputed/alleged to exist), it is comparable to such beetles as the Macrodontia cervicornis and the Hercules beetle. But the Hercules beetle males have an enormous horn on the pronotum or thorax making up around half of its total length. And also Macrodontia cervicornis’ length due to the enormous mandibles. As such, the body of the Titan beetle is considerably larger than that of the Hercules beetles and the Macrodontia cervicornis.
Titan beetle is known from the rain forests of Venezuela, Colombia, Ecuador, Peru, the Guianas, and north-central Brazil.