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A predaceous water beetle. Taxonomy from Xianye et al. 2018. Diagnosis (Xianye et al. 2018, p. 4): "Head prognathous with strong mandibles; a pair of rounded compound eyes on the sides of the head; femur narrow and slightly longer than the tibia, with a pair of strong spurs; tarsus pointed towards the end, with a pair of strong claws; abdomen with 8 sterna with a spiracle on each side; female has three pairs of valvulae attached to the eighth sternum; elytra scabrous with a few longitudinal striae; the junctions of the front and posterior margins of the elytra are clearly angled, the elytra protruding, the front edge arcuate." Line drawing from Xianye et al. 2018, p. 15: Identified by oilshale. References: C. Ping. 1928. Study of the Cretaceous fossil insects of China. Palaeontologia Sinica, Series B 13:5-57. Xianye, Z., Xiangdong, Z., Jarzembowski, E.A., Lei, C., Bo, W., (2018) First record of adult Coptoclava longipoda Ping (Coleoptera: Coptoclavidae) from the Lower Cretaceous of Laiyang, China, Cretaceous Research, doi: 10.1016/j.cretres.2018.08.013.

In January 1999, two new choristoderans - aquatic living diapside reptiles - from the Jehol biota (Early Cretaceous of Liaoning , China) were described by the "Institute of Vertebrate Paleontology and Paleoantropology" (IVPP) and by the "Beijing Natural History Museum" (BVC) under the names Sinohydrosaurus lingyuanensis Li et al., 1999 und Hyphalosaurus lingyuanensis Gao et al., 1999. It turned out that both institutes independently described slab and counterslab of the same individuum. H. lingyuanensis is the valid name, this description was published slightly earlier - just by a couple of days. This is a hatchling, adult Hyphalosaurs can reach almost 1.5m in length. Hyphalosaurus is often faked and sold under the designation Jurassic Nothosauria. References: Smith, J. and Harris J. (2001): A TAXONOMIC PROBLEM CONCERNING TWO DIAPSID GENERA FROM THE LOWER YIXIAN FORMATION OF LIAONING PROVINCE, NORTHEASTERN CHINA. Journal of Vertebrate Paleontology 21(2):389–391, June 2001. Hou, L. et al.(2009): Implications of flexible-shelled eggs in a Cretaceous choristoderan reptile. Proc. R. Soc. B doi:10.1098/rspb. 2009.2035, Published online Gao, K. and Ksepka, D. (2008): Osteology and taxonomic revision of Hyphalosaurus (Diapsida: Choristodera) from the Lower Cretaceous of Liaoning, China. J. Anat. (2008) 212, pp 747–768