Leonardiella seychellensis sp. nov. is described based on three females and one male collected from Praslin in a mixed soil and decaying wood sample. The new species differs from the congeners in the shape and sculptural pattern of the female genital shield and the shape of the strongly sclerotized grooves on the dorsal shield. The species presented from East African islands (Mauritius, Reunion, Comoros, and Madagascar) are also listed and discussed.