Abstract
Male spider specimens collected in Thailand were identified as males of Anepsion japonicum Yaginuma 1962. There was no conclusive evidence that female specimens collected at the same time belong to the same species, because the female of the species has not been described. We compared morphological data and mt-COI sequencing data for these female specimens with those of males and concluded that the female specimens belonged to the same species as the males. However, comparison of morphological data for the females and the holotype of Paraplectana japonica Bösenberg & Strand 1906 revealed that Anepsion japonicum Yaginuma 1962 is a junior synonym of P. japonica. Furthermore, after examining the taxonomic features of the holotype of P. japonica, it became clear that this species should be placed in the genus Anepsion. Therefore, the specific name was changed to Anepsion japonicum (Bosenberg & Strand 1906). Consequently, this work permits recording of two new spider species from Thailand: Anepsion depressum (Thorell 1877) and Anepsion japonicum (Bösenberg & Strand 1906).
