Abstract
Fifteen new species of the Leucophenga ornata species group are described from East Asia: L. apunctata Huang & Chen, sp. nov., L. arcuata Huang & Chen, sp. nov., L. brevifoliacea Huang & Chen, sp. nov., L. euryphylla Huang & Chen, sp. nov., L. falcata Huang & Chen, sp. nov., L. fuscinotata Huang & Chen, sp. nov., L. fuscithorax Huang & Chen, sp. nov., L. glabella Huang & Chen, sp. nov., L. hirsutina Huang & Chen, sp. nov., L. hirudinis Huang & Chen, sp. nov., L. piscifoliacea Huang & Chen, sp. nov., L. rectifoliacea Huang & Chen, sp. nov., L. serrateifoliacea Huang & Chen, sp. nov., L. subulata Huang & Chen, sp. nov., L. uncinata Huang & Chen, sp. nov. Four known species, L. ornata Wheeler, 1959, L. saigusai Okada, 1968, L. sculpta Chen & Toda, 1994 and L. todai Sidorenko, 1991 are redescribed as supplementary. A key to all the examined species in the ornata group is provided. We try to improve our species delimitation by integrating the DNA sequences data with morphological information. The intra- and interspecific pairwise K-2P (Kimura’s two-parameter) distances are summaried.