Prismognathus is a genus of beetles of the family Lucanidae.

Species Prismognathus alessandrae Bartolozzi, 2003 Prismognathus angularis Waterhouse, 1874 Prismognathus arcuatus (Houlbert, 1915) Prismognathus bousqueti (Boucher, 1996) Prismognathus castaneus (Didier, 1926) Prismognathus dauricus (Motschulsky, 1860) Prismognathus davidis Deyrolle, 1878 Prismognathus delislei Endrödi, 1971 Prismognathus formosanus Nagel, 1928 Prismognathus haojiani Huang & Chen, 2012 Prismognathus helii Wang & He, 2024A new species of the genus Prismognathus Motschulsky (Coleoptera: Lucanidae) from Yunnan, China Prismognathus kanghianus (Didier & Séguy, 1953) Prismognathus katsurai Ikeda, 1997 Prismognathus klapperichi Bomans, 1989 Prismognathus kucerai Baba, 2004 Prismognathus kurosawai Fujita & Ichikawa, 1986 Prismognathus lucidus Boileau, 1904 Prismognathus mekolaorum Okuda & Maeda, 2015 Prismognathus mixtus Huang & Chen, 2017 Prismognathus miyashitai Ikeda, 1997 Prismognathus nigricolor Boucher, 1996 Prismognathus nobuhikoi (Ikeda, 2000) Prismognathus nosei Nagai, 2000 Prismognathus oberthuri (Houlbert, 1912) Prismognathus parvus Didier, 1928 Prismognathus passangi Okuda & Maeda, 2015 Prismognathus platycephalus (Hope, 1842) Prismognathus prossi Bartolozzi & Wan, 2006 Prismognathus ruficephalus Lacroix, 1978 Prismognathus shani Huang & Chen, 2012 Prismognathus sinensis Bomans, 1989 Prismognathus siniaevi Ikeda, 1997 Prismognathus subnitens (Parry, 1862) Prismognathus sukkitorum Nagai, 2005 Prismognathus transiens Huang, Chen, Tao & Xiao, 2020 Prismognathus triapicalis (Houlbert, 1915) Prismognathus yukinobui Nagai, 2005 Prismognathus yutangi Huang & Chen, 2018 Prismognathus zhangi Huang & Chen, 2013 Prismognathus zhihongi Wang & Huang, 2025

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