The Nitidulidae includes 10 subfamilies and over 350 genera and 4500 species and is the largest family in Cucujoidea. We place the enigmatic subfamily Calonecrinae into the internal relationship of Nitidulidae, a comprehensive molecular phylogenetic analysis was performed using five gene regions (COI, 28s, CAD, H3, Wingless) for 80 taxa. We included 73 ingroup taxa representing nine of the ten currently recognized subfamilies of Nitidulidae and 7 outgroups. The phylogenetic results are consistent with prior molecular studies, that include a polyphyletic Nitidulinae with the inclusion of Meligethinae and Cillaeinae and that the Calonecrinae is sister taxon to Epuraeinae. Ancestral state reconstruction of feeding behavior indicates that stem group nitiduilds were most probably sap-feeding with transitions to other feeding types independently derived multiple times.

• Min Hyeuk Lee(Insect Biosystematics Laboratory, Department of Agricultural Biotechnology, Seoul National University/Research Institute for Agricultural and Life Sciences, Seoul National University/Korea National Park Service)
• Seunghyun Lee(Insect Biosystematics Laboratory, Department of Agricultural Biotechnology, Seoul National University/Research Institute for Agricultural and Life Sciences, Seoul National University)
• Richard A. B. Leschen(Manaaki Whenua - Landcare Research, New Zealand Arthropod Collection)
• Seunghwan Lee(Insect Biosystematics Laboratory, Department of Agricultural Biotechnology, Seoul National University/Research Institute for Agricultural and Life Sciences, Seoul National University)