Its hundreds of species are spread over its range, many of them still undescribed. New Guinea appears to be a centre of its diversity with more than 300 species recorded [17,18]. Specimens are found sitting on foliage or in the litter of forest floors, but little is known of their biology. A compact thanatosis position may be a character that gained evolutionary significance with Trigonopterus’ inability to fly. Thus, a full understanding of the passive defence mechanisms may lead to a better understanding of the genus’ extraordinary diversity.