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    A new aberrant species of Nipponocercyon from the mountains of southeastern China (Coleoptera: Hydrophilidae: Sphaeridiinae)
    (2015) Fikaček, M.; Feng-Long Jia; Ryndevich, S. K.; Рындевич, С. К.
    Nipponocercyon satoi sp. nov. is described from the mountains of Zhenjiang and Jiangxi Provinces in Southwest China. Although the species bears all synapomorphies of Nipponocercyon Sato, 1963, it differs substantially from the other two species of the genus by its Pacrillum-like habitus (i.e. small, compact and strongly convex body with reduced surface sculpturing). The new species is compared in detail with the other two Nipponocercyon species as well as with Pacrillum Orchymont, 1941 and Megasternum Mulsant, 1844. The generic diagnosis of Nipponocercyon is adapted, and reasons for assigning the new species to Nipponocercyon are discussed.
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    An aberrant species of Nipponocercyon from Sichuan, China (Coleoptera: Sphaeridiinae)
    (Pensoft Publishers, 2012) Fikáček, M.; Ryndevich, S. K.; Feng-Long Jia; Рындевич, С. К.
    A detailed examination of specimens of Cryptopleurum sichuanicum Ryndevich, 2005 from high altitudes of Sichuan Province, China, revealed that the species belongs in the genus Nipponocercyon Satô, 1963 previously endemic to Japan. The species is here transferred in Nipponocercyon, and N. sichuanicus (Ryndevich, 2005), comb. n. is redescribed and compared with N. shibatai Satô, 1963. The male genitalia of N. sichuanicus is described for the first time. An adapted diagnosis of Nipponocercyon is provided, and reasons for the inclusion of N. sichuanicus into Nipponocercyon and the general distribution of the genus are discussed.
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    Taxonomic notes on Chinese Cercyon: description of a new species, new synonyms, and additional faunistic records (Coleoptera: Hydrophilidae: Sphaeridiinae)
    (2011) Feng-Long Jia; Fikaček, M.; Ryndevich, S. K.; Рындевич, С. К.
    A new species, Cercyon (Clinocercyon) hanseni sp. nov., is described from Jiangxi and Guizhou Provinces, China. Based on a study of type material, the following synonymies are proposed for the species occurring in China: Cercyon signifer Hebauer, 2002 is synonymized with C. (s. str.) berlovi Shatrovskiy, 1999, Cercyon guangxiensis Wu et Pu, 1995 with Cercyon (s. str.) quisquilius (Linnaeus, 1761), Cercyon nigrostriatus Wu et Pu, 1995 with Cercyon (Clinocercyon) lineolatus (Motschulsky, 1863), Cercyon vicinaloides dʼOrchymont, 1925, and Cercyon tropisternus Wu et Pu, 1995 with Cercyon (Paracycreon) laminatus Sharp, 1873, and Cercyon linearis Wu et Pu, 1995 with Cercyon (Paracycreon) subsolanus Balfour- Browne, 1939. A lectotype is designated for Cercyon vicinalis var. vicinaloides dʼOrchymont, 1925. Three Palaearctic species are recorded from China for the first time: Cercyon (s. str.) ovillus Motschulsky, 1860, Cercyon (s. str.) olibrus Sharp, 1874 and Cercyon (s. str.) unipunctatus (Linnaeus, 1758). Additional faunistic data from China are provided for Cercyon berlovi and Cercyon nigriceps (Marsham, 1802). Cercyon amplelevatus Jia, 1995 is transferred to the genus Armostus Sharp, 1890. A checklist of all Cercyon species recorded from China is presented, along with a tentative identification key.