Abstract
Three new species of Patrus Aubé, 1838 are described from China: Patrus hainanensis sp. nov. from Hainan; Patrus jiangxiensis sp. nov. from Jiangxi; Patrus shangchuanensis sp. nov. from Guangdong. Eight species / subspecies of Gyrinidae are recorded from China for the first time: Metagyrinus vitalisi (Peschet, 1923), Orectochilus argenteolimbatus Peschet, 1923, Orectochilus murinus Régimbart, 1892, Patrus haemorrhous (Régimbart, 1892), Patrus marginepennis angustilimbus (Ochs, 1925) from Yunnan; Patrus coomani (Peschet, 1925) from Guangdong; Patrus procerus (Régimbart, 1884) from Guangxi; Patrus annandalei (Ochs, 1925) from Hainan. Additional faunistic data of Gyrinidae from China are provided. A key to Chinese species of Patrus Aubé based on examined specimens from China is given.
Highlights
Gyrinidae Latreille, 1810 is the second largest family of aquatic Adephaga Schellenberg, 1806, with a total of approximately 900 species assigned to 13 extant genera (Miller & Bergsten 2012; Gustafson & Miller 2017; Miller & Short 2018), of which seven genera and 56 species / subspecies have been recorded from China (Mazzoldi 1995, 2003; Hájek & Fery 2019)
LIANG Z. et al, Three new species of Patrus with additional records of Gyrinidae from China with dense adhesive setae and small suction discs, almost as long as protibia; 7) aedeagus as in Fig. 5E, median lobe shorter than parameres, extending 4/5 length, apical part notably narrowed, sub-apically slightly constricted; 10) female reproductive tract as in Fig. 6C, spermatheca elongate, C-shaped; fertilization duct rather slender and flattened, forming several loose hairpin hoops
Gyrinidae have been poorly studied in the Oriental Region except for some contributions to the Chinese (Mazzoldi 1998) and Indian (Vazirani 1984; Miller et al 2008) faunas
Summary
Gyrinidae Latreille, 1810 is the second largest family of aquatic Adephaga Schellenberg, 1806, with a total of approximately 900 species assigned to 13 extant genera (Miller & Bergsten 2012; Gustafson & Miller 2017; Miller & Short 2018), of which seven genera and 56 species / subspecies have been recorded from China (Mazzoldi 1995, 2003; Hájek & Fery 2019). Several new species were reported from China (Falkenström 1936; Ochs 1936, 1942). Mazzoldi (1995) revised the catalogue of Chinese Gyrinidae, with 46 species/subspecies reported. Hájek & Fery (2019) revised the catalogue of Palaearctic Gyrinidae, with 51 Chinese species / subspecies recorded, including 27 species of Patrus. Despite the studies mentioned above, the taxonomic study of Chinese Gyrinidae is still deficient and in need of a thorough revision
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