Abstract
Four new species are described in two psilodercid genera, Qiongocera Li & Li, 2017 and Relictocera Li & Li, 2017: Qiongoceraluoxuan Li & Li, sp. nov. (♂♀) from China, Relictocerawugen Li & Li, sp. nov. (♂♀) and R.sigen Li & Li, sp. nov. (♂) from Vietnam, and R.qianzi Li & Li, sp. nov. (♂♀) from Thailand. These genera were previously thought to be monotypic. In addition, one species of the genus Merizocera Fage, 1912 is transferred to Relictocera: Relictoceramus (Deeleman-Reinhold, 1995), comb. nov. (♂♀). The types of the new species are deposited in the Institute of Zoology, Chinese Academy of Sciences (IZCAS) in Beijing.
Highlights
The spider family Psilodercidae Machado, 1951 was previously considered to be a subfamily of Ochyroceratidae Fage, 1912 by Machado (1951), and this was supported by Deeleman-Reinhold (1995)
Phylogenetic analyses suggest that Psilodercidae are the sister group to the lineage encompassing Sicariidae Keyserling, 1880 and Scytodidae Blackwall, 1864 (Shao and Li 2018)
Half of them belong to the genus Althepus Thorell, 1898
Summary
The spider family Psilodercidae Machado, 1951 was previously considered to be a subfamily of Ochyroceratidae Fage, 1912 by Machado (1951), and this was supported by Deeleman-Reinhold (1995). Psilodercids were elevated to family rank by Wunderlich (2004, 2008). Psilodercidae comprises 120 named species in 11 genera (WSC 2019; Li and Quan 2017). Of these species, half of them belong to the genus Althepus Thorell, 1898. Half of them belong to the genus Althepus Thorell, 1898 The other genera, such as Flexicrurum Tong & Li, 2007, Luzonacera Li & Li, 2017, Qion-
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