The xanthid genus Glyptoxanthus A. Milne-Edwards, 1879, known from the tropical eastern Pacific, western and eastern Atlantic, and the Red Sea, is revised as part of an ongoing revision of the subfamily Euxanthinae Alcock, 1898. Analysis of morphological characters shows that Glyptoxanthus must be excluded from the subfamily Euxanthinae and placed in a distinct subfamily, Glyptoxanthinae nov. s...