Trigonopterus oblongus



Trigonopterus oblongus is a weevil found in Papua. It was notable as the first known instance of a biological screw joint. The weevils are just 4 mm long and can fold their legs below their body. The biological screw joint is just 0.5 mm in size. This discovery was made by Alexander Riedel of the State Museum of Natural History Karlsruhe and by Thomas van de Kamp of the Karlsruhe Institute of Technology.