Family Nitidulidae is the second largest family in Cucujoidea which includes ten subfamilies. Because of their morphological and biological diversity, the phylogenetic relationship within Nitidulidae is one of the most debated topics among Cucujoidea phylogeny and yet, is still open to many questions. To recover the internal relationship of Nitidulidae, we performed ML and BI analyses that targeted on five gene regions (COI, 28s, CAD, H3, Wingless) for 73 taxa. We include 67 ingroups containing nine of the ten currently recognized subfamilies of Nitidulidae and 6 outgroups. The phylogenetic results suggest followings i) Subfamilial status of Prometopinae is reconfirmed; ii) Epuraeinae is paraphyletic with inclusion of Calonecrinae; iii) Nitidulinae is paraphyletic with inclusion of Meligethinae and Cillaeinae. In addition, the generic relationships within Nitidulinae and the evolutionary history of their feeding behaviors are also briefly discussed.

• Min Hyeuk Lee(Laboratory of Insect Biosystematics, Department of Agricultural Biothechnology, Seoul National University, Research Institute for Agricultural and Life Sciences, Seoul National University)
• Seunghyun Lee(Laboratory of Insect Biosystematics, Department of Agricultural Biothechnology, Seoul National University, Research Institute for Agricultural and Life Sciences, Seoul National University)
• Seunghwan Lee(Laboratory of Insect Biosystematics, Department of Agricultural Biothechnology, Seoul National University, Research Institute for Agricultural and Life Sciences, Seoul National University)