What is the ONLY insect that can turn its head?

1) Some people are talking about 360 degrees: "The only insect that can turn its head 360 degrees is the praying mantis." Source: <a href="http://www.oddrob.com/bugfacts.asp" target="_blank" rel="nofollow">http://www.oddrob.com/bugfacts.asp</a> I don't know if there are many other animals who can do this! 2) Others stay by 180 degrees: "The front portion of the thorax (prothorax), the region just behind the head, is also greatly elongated, forming a necklike structure; mantises are the only insects that can turn their heads to look directly behind them." Source: <a href="http://www.4to40.com/encyclopedia/index.asp?id=656" target="_blank" rel="nofollow">http://www.4to40.com/encyclopedia/index.asp</a> Here we are talking about 180 degrees... "It has been shown that this insect is capable of stereoscopic vision, allowing it to accurately gauge distances as do most mammalian predators; it uses the extreme mobility of its head (a mantis can turn its head fully 180 degrees and their vision ... more