Taxonomic notes on the armored spiders of the families Pacullidae and Tetrablemmidae (Arachnida, Araneae) from Singapore.

Eight species of armored spiders belonging to two families, Pacullidae Simon, 1894 and Tetrablemmidae O. Pickard-Cambridge, 1873, are reported from Singapore. Five species are documented as new to science: Lin & Li, (male and female), Lin & Li, (male and female), Lin & Li, (male and female), Lin & Li, (male and female), and Lin & Li, (male). The three known species are Lin, Li & Jäger, 2012, Lehtinen, 1981, and Shear, 1978, of which the female of is described for the first time. For comparison, types of Lehtinen, 1981 from Vietnam, Lehtinen, 1981 from Vietnam, from Singapore and Lehtinen, 1981 from Malaysia are studied and photographed.