A revision of Anacaena Thomson, 1859 X. Laos, Malaysia, Myanmar, Thailand, and Vietnam (Coleoptera: Hydrophilidae)

The species of Anacaena Thomson, 1859 from Laos, Malaysia, Myanmar, Thailand, and Vietnam are revised. Seventeen species are reported from these countries. Anacaena nanica (Gentili, 2002) is redescribed and 14 new species, A. brancuccii, A. feae, A. fikaceki, A. fuscopunctata, A. hajeki, A. lamdongica, A. laotica, A. latepatens, A. mazzoldii, A. mawara, A. montana, A. nongfana, A. schillhammeri, and A. shepardi are described. Anacaena maculata Pu, 1964, originally recorded from China, also occurs in Laos and Thailand. Morphological details are illustrated and a key to the species is presented.