A revision of the Trioserica species from continental southeast Asia (Coleoptera: Scarabaeidae: Sericinae: Sericini)1

Abstract The current paper gives an overview of the species so far assigned to the genus Trioserica Moser, 1922 which occur in continental southeast Asia. The types of the known species are revised and 42 new species are described: Trioserica achterbergi Ahrens, Lukic & Pham, sp. n., T. bachma Ahrens, Lukic & Pham, sp. n., T. bansongcha Ahrens, Lukic & Pham, sp. n., T. bresseeli Ahrens, Lukic & Pham, sp. n., T. chaudoc Ahrens, Lukic & Pham, sp. n., T. chaweewanae Ahrens, Lukic & Pham, sp. n., T. chumomray Ahrens, Lukic & Pham, sp. n., T. chuyangsin Ahrens, Lukic & Pham, sp. n., T. csorbai Ahrens, Lukic & Pham, sp. n., T. dalat Ahrens, Lukic & Pham, sp. n., T. dongnai Ahrens, Lukic & Pham, sp. n., T. geiseri Ahrens, Lukic & Pham, sp. n., T. guerlaechi Ahrens, Lukic & Pham, sp. n., T. hartmanni Ahrens, Lukic & Pham, sp. n., T. huaypok Ahrens, Lukic & Pham, sp. n., T. khaoyai Ahrens, Lukic & Pham, sp. n., T. konplongensis Ahrens, Lukic & Pham, sp. n., T. lamdongensis Ahrens, Lukic & Pham, sp. n., T. namphak Ahrens, Lukic & Pham, sp. n., T. nongfa Ahrens, Lukic & Pham, sp. n., T. pahinngam Ahrens, Lukic & Pham, sp. n., T. pakse Ahrens, Lukic & Pham, sp. n., T. paulseni Ahrens, Lukic & Pham, sp. n., T. phataem Ahrens, Lukic & Pham, sp. n., T. phetchabun Ahrens, Lukic & Pham, sp. n., T. phnomkulen Ahrens, Lukic & Pham, sp. n., T. phuphan Ahrens, Lukic & Pham, sp. n., T. pongpitaki Ahrens, Lukic & Pham, sp. n., T. preahkhan Ahrens, Lukic & Pham, sp. n., T. prome Ahrens, Lukic & Pham, sp. n., T. samoeng Ahrens, Lukic & Pham, sp. n., T. sanogae Ahrens, Lukic & Pham, sp. n., T. seideli Ahrens, Lukic & Pham, sp. n., T. sekongensis Ahrens, Lukic & Pham, sp. n., T. skalei Ahrens, Lukic & Pham, sp. n., T. tadfaek Ahrens, Lukic & Pham, sp. n., T. tenasserim Ahrens, Lukic & Pham, sp. n., T. theinzek Ahrens, Lukic & Pham, sp. n., T. tongbiguan Ahrens, Lukic & Pham, sp. n., T. vientiane Ahrens, Lukic & Pham, sp. n., T. vriesi Ahrens, Lukic & Pham, sp. n., T. vuquang Ahrens, Lukic & Pham, sp. n. The revision resulted also in three new combinations: Trioserica rugosa (Brenske, 1899) comb. n., T. maculata (Frey, 1972) comb. n. and T. minima (Frey, 1972) comb. n. A key to the species of continental SE Asia is given. The diagnostic characters of the newly revised taxa and their distribution are illustrated.