An article published in the journal "Science Bulletin" reports the identification of Terropterus xiushanensis, a species belonging to the order of the eurypterids (Eurypterida), the so-called sea scorpions, which lived about 435 million years ago, during the Silurian period, in today's China. A team of researchers examined several fossils discovered in the Xiushan Formation and concluded that it belongs to a genus from the ones known and attributed it to the Mixopteridae family. It's the first sea scorpion attributed to that family discovered in China.