New Mesozoic Water Scavenger Beetles from the Yixian Formation in China (Coleoptera: Hydrophiloidea)
One new fossil genus and four new fossil species are described from the Late Tithonian-Berriasian Yixian Formation (Huangbanjigou) in China: Sinosperchopsis silinae gen. et sp. nov., Hydrophilopsia shatrovskiyi sp. nov., H. hydraenoides sp. nov. and H. gracilis sp. nov. (Coleoptera: Hydrophiloidea). The genus Sinosperchopsis is compared with all Mesozoic hydrophiloid genera known so far.