Description of a new species of Kibakoganea from Vietnam (Coleoptera: Scarabaeidae: Rutelinae: Rutelini).

Kibakoganea canhcamsung new species (holotype male and paratype female), from Quang Nam province, Vietnam, is described and illustrated based on two specimens. The genus Kikobaganea Nagai was erected as subgenus of Fruhstoferia (Nagai 1984). Hirasawa (1992) later elevated Kibakoganea to the generic level. In that paper, Hirasawa erected two new related genera from Malaysia, Muramotokoganea Hirasawa and Nagainokoganea Hirasawa. The latter genus was originally defined based on two species N. malayanus from Malaysia and N. curta from Laos. Later, N. curta was moved to the genus Pukupuku Muramoto with P. kasurai, another species from Vietnam, based on similarities in the male genitalia (Muramoto 2006). Therefore, the genus Nagainokoganea only contains the type species N. malayanus, and perhaps the classification should be reconsidered or redefined with updated characteristics. The similarities of N. malayanus with Didrepanephorus bifurcifer Wood Mason suggest the possibility that Nagainokoganea should be a synonym or subgenus of Didrepanephorus Wood Mason. Young (1999) described a new species from Myanmar and considered Kibakoganea to be a subgenus of Fruhstorferia. In the publication, Young compared the genus Fruhstorferia with Didrepanephorus based on their mandible and golden brown setae on the body. However that diagnosis of Fruhstorferia seems artificial and may include many genera. I consider Kibakoganea and Pukupuku to be separate genera based on the clear differences in the male genitalia and the shape of the mandible, with the setae on the body being variable in many different genera. The type species of the genus Kibakoganea, K. sexmaculata (Kraatz), was originally described in 1900, but a full description of the lectotype was not available until recently (Miyake & Muramoto 2003). The distribution of this genus is limited mainly to southeast Asia, southern China, and Taiwan. Thirteen species of Kikobaganea have been described, including six from Vietnam: K. fujiokai Miyake & Muramoto, K. kraatzi Miyake & Muramoto, K. opaca Muramoto, K. sexmaculata (Kraatz), K. tamdaoensis Miyake & Muramoto, and K. vernicata (Benderitter). The purpose of this paper is to describe a new species from central Vietnam.