Four new species of the genus Eophileurus Arrow, 1908 (Coleoptera: Scarabaeidae Dynastinae) from Thailand and Vietnam, with notes on some Indochinese species Author Yang, Qiao-Zhi 3 B, Pingguoshequ, Baiziwan Road, Chaoyang Dist., Beijing, 100022, P. R. China. Author Pathomwattananurak, Wuttipon 1051 / 38 Wiang, Mueang Dist., Chiang Rai Province, 57000, Thailand. text Zootaxa 2022 2022-07-18 5165 4 451 485 journal article 99517 10.11646/zootaxa.5165.4.1 cd84b880-d77f-401a-bf4c-a98021a5e166 1175-5326 6853942 DBE812FF-7B25-4522-97FE-45A86ECAEFD7 Eophileurus gracilis Prell, 1913 ( Figs. 54–64 ) Eophileurus gracilis Prell, 1913: 116 ( type locality: “Andamanen”), plate 1–2, fig. 9 (parameres); Arrow 1937: 84 ; Endrődi 1977: 106 (Coromandel; Delhi ; Genji; Madras; Taniore; Bhadravati), fig. 15 (parameres); Endrődi 1985: 667 , fig. 2018 (parameres); Krajčik 2005: 64 ; Yamaya & Muramoto 2008: 26 , figs. 65–66 (female habitus), fig. 67 (female pronotum), fig. 68 (female elytra); Krajčik 2012: 101 ; Jákl & Zídek 2015: 19 . Eophileurus andamanicus Arrow, 1914: 261 ( type locality: “Andaman Is.”; “Nicobar Is”.), plate 13, fig. 3 (parameres); Arrow 1937: 84 ; Endrődi 1977: 95 (synonymized with Eophileurus gracilis Prell, 1913 ); Krajčik 2005: 64 (in synonymy). Type material examined. Lectotype of Eophileurus gracilis Prell, 1913 ( ♂ , MFNB , Figs. 54–59 ), labeled: “Andamanen // Eophileurus gracilis Prell ♂ - Type // Lectotypus Eophileurus gracilis Prell SEndrődi”. Lectotype of E. andamanicus Arrow, 1914 (hereby designated; ♂ , BMNH , Figs. 60–64 ), labeled: “SYN-TYPE // Andaman Islands // Fry Coll. 1905-100. // Capt Wimberley // 45001 // NHMUK 014380703”, an additional red label will be provided labeling: “ Lectotype Eophileurus andamanicus Arrow, 1914 des. Yang & Pathomwattananurak 2022”, examined through photographs provided by Keita Matsumoto. Paralectotypes of E. andamanicus Arrow, 1914 , 1♀ ( BMNH ), labeled: “SYN-TYPE // Andaman Islands // Fry Coll. 1905-100. // Capt Wimberley // NHMUK014380707 ” ; 1♀ ( BMNH ), same data as the first ♀ , but the last label with “ NHMUK014380704 ” and with an additional label: “ planatus, Wied. Puncture rather tiner than type compared with type. G. A. K. M. Sept. 1907 .” ; 1♂ ( BMNH ), same data as the first ♀ , but the last label with “ NHMUK014380705 ” and with an additional label: “ ♂ ” ; 1♂ ( BMNH ), same data as the first ♀ , but the last label with “ NHMUK014380706 ” and with an additional label: “ Eophileurus gracilis , Prell Determined from description. G. J. A.” ; 1♀ ( BMNH ), same data as the first ♀ , but the last label with “ NHMUK014380708 ” and with an additional label: “ ♀ ” ; 1♀ ( BMNH ), same data as the first ♀ , but the last label with “ NHMUK014380708 ” ; 1♂ ( BMNH ), labeled: “SYN-TYPE // TYPE H. T . // Roeþtorff // Sumatra Nicobar I. // Fry Coll. 1905-100. // NHMUK014380702 ”. An additional red label will be provided for each paralectotype labeling: “ Paralectotype Eophileurus andamanicus Arrow, 1914 des. Yang & Pathomwattananurak 2022”, examined through photographs provided by Keita Matsumoto . Additional material examined . None. Distribution. India : Andaman Is., Nicobar Is. FIGURES 54–59. Lectotype of Eophileurus gracilis Prell, 1913 . 54, habitus, dorsal; 55, habitus, lateral; 56, habitus, ventral; 57, parameres, apical; 58, parameres, lateral; 59, labels. Remarks. Eophileurus gracilis Prell, 1913 was described from Andaman Island. Eophileurus andamanicus Arrow, 1914 was described from Andaman Island and Nicobar Island by Arrow (1914) without mentioning the species described by Prell one year prior, it is then treated as junior synonym of E. gracilis by Endrődi (1985) . By examining the type material of E. gracilis ( Figs. 54–59 ) and E. andamanicus ( Figs. 60–64 ), the treatment by Endrődi is considered valid. Lectotype of E. andamanicus is designated for the only syntype originally dissected by Arrow. The paralectotype from Nicobar Island was dissected by Keita Matsumoto (BMNH) and confirmed to be conspecific, thus confirming its distribution on Nicobar Island.