%0 Journal Article %A Yafei Xin %A Tongyao Jiang %A Zhiyuan Yao %A Shuqiang Li %T Twenty new spider species (Arachnida: Araneae) from Late Cretaceous Kachin amber (Myanmar) %D 2022 %R 10.11865/zs.2022101 %J Zoological Systematics %P 1-65 %V 47 %N 1 %X Twenty new species of extinct spiders belonging to 11 genera in five families from Late Cretaceous Kachin amber are reported. One new genus, Triangulum Jiang & Li, gen. nov., of the family Theridiidae Sundevall, 1833 was established with T. thutai Jiang & Li, sp. nov. as the type species. The remaining 19 new species are: Retrooecobius lwini Jiang & Li, sp. nov., Zamilia arkari Jiang & Li, sp. nov., Z. sheini Jiang & Li, sp. nov., Z. shwayi Jiang & Li, sp. nov. from Oecobiidae Blackwall, 1862; Furcembolus inzaliae Jiang & Li, sp. nov. from Pacullidae Simon, 1894; Priscaleclercera chimei Jiang & Li, sp. nov., P. foshou Jiang & Li, sp. nov., P. hlaingi Jiang & Li, sp. nov., P. kani Jiang & Li, sp. nov., P. kyawae Jiang & Li, sp. nov., P. thanae Jiang & Li, sp. nov., P. thaungi Jiang & Li, sp. nov. from Psilodercidae Machado, 1951; Bicornoculus aungi Jiang & Li, sp. nov., B. wunnai Jiang & Li, sp. nov., B. yarzari Jiang & Li, sp. nov., Cymbioblemma ohnmari Jiang & Li, sp. nov., Palpalpaculla phyui Jiang & Li, sp. nov. from Tetrablemmidae O. Pickard-Cambridge, 1873; Burmatheridon cetani Jiang & Li, sp. nov., Cretotheridion champoi Jiang & Li, sp. nov., from Theridiidae. All species are described based on males. All types are deposited in the Institute of Zoology, Chinese Academy of Sciences (IZCAS) in Beijing, China. %U https://www.zootax.com.cn/EN/10.11865/zs.2022101