With detailed morphological comparison, this research transferred a beetle species from Carinaulus nanxiensis into a new combination of Odontoxyomus nanxiensis discovered in the central region of Taiwan, and compared with similar species distributed in Laos. Based on the detailed characteristics seen in the scanning eletron microscope, we provide a redescription of the species with illustrations of male and female, male genitalia, diagnosis of the genus, and a distribution map.