Revision of the Chinese termite genus Peribulbitermes (Blattodea, Isoptera, Termitidae): A new synonym of Ahmaditermes

The genus Peribulbitermes is a small genus in Nasutitermitinae comprising three species distributed only in China. Type specimens of Peribulbitermes dinghuensis Li, 1985 and Peribulbitermes jinghongensis Li, 1985 are obtained in our study. After examining the morphological characters of the specimens, it is found that P. jinghongensis cannot be differentiated from P. dinghuensis by the diagnostic characters reported in original description. We propose that P. jinghongensis is the junior synonym of P. dinghuensis. Additionally, molecular phylogenetic relationships of Peribulbitermes, with its morphologically similar genera, Bulbitermes, Ahmaditermes and Nasutitermes, as well as other nine genera in Nasutitermes Group of Nasutitermitinae were analysed based on mitochondrial COI, COII and 16S rRNA genes. The results show that the relationship between Peribulbitermes and Ahmaditermes is the closest. Peribulbitermes should be downgraded to synonymy of Ahmaditermes. P. dinghuensis and Peribulbitermes parafulvus (Tsai and Chen, 1963) should be transferred to Ahmaditermes as Ahmaditermes dinghuensis and Ahmaditermes parafulvus.