A new species of Aegus Macleay, 1819 (Coleoptera: Lucanidae: Lucaninae: Aegini) from Thailand with checklist of the genus species from the country Author Pathomwattananurak, Wuttipon 1051 / 38 Wiang, Mueang Dist., Chiang Rai Province, 57000, Thailand Author Jiaranaisakul, Kawin Rabbit in the Moon Foundation, 399, Village No. 3, Suan Phueng, Ratchaburi, 70180, Thailand text Zootaxa 2024 2024-05-21 5453 3 341 358 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 10.11646/zootaxa.5453.3.2 1175-5326 11234118 285FAECF-D307-48F5-9FA1-DE6320EA0F7C Aegus insignis Nagel, 1941 ( Figs. 42–43 ) Aegus insignis Nagel, 1941: 60 . Type locality: Malacca . Benesh 1960: 102 ; Mizunuma & Nagai 1994: 292 ; Krajcik 2003: 18 ; Fujita 2010: 363 . Material examined ( 3♂♂ , 1♀ ). Thailand : 1♂ , 1♀ ( WPC ), Nakhon Si Thammarat Prov. , Thung Song Dist. , Nam Tok , 13.VIII.2019 , Aussawa Samudjit leg. ; 1♂ ( THNHM ), Nakhon Si Thammarat Prov. , 17.IV.2007 , Weeyawat Jaitrong & Tadsanai Jeenthong leg. ; 1♂ ( KKIC ), Nakhon Si Thammarat Prov. , Khao Nan , 11.III.2004 , N. Pinkaew leg. Distribution. Malaysia ( Nagel 1941 ; Mizunuma & Nagai 1994 ; Krajcik 2003 ; Fujita 2010 ) and Thailand ( Nakhon Si Thammarat Province ) ( new record ).