Tetrablemma O. P.-Cambridge, 1873

Type species.

Tetrablemma medioculatum O. P.-Cambridge, 1873 from Sri Lanka.

Diagnosis.

Tetrablemma is close to Singalangia Lehtinen, 1981 and Rhinoblemma Lehtinen, 1981. Tetrablemma is separated from Singalangia by largely different pattern of abdominal plates, by well developed lateral horns of vulva, and by lack of apomorphic modifications of the same type in sternum and epigynal area. It is separated from Rhinoblemma by different types of sexual dimorphism in the male clypeal area and chelicerae.

Distribution.

Twenty five species have previously been described from Angola, Western Australia, China, Flores, India, Laos, Micronesia, Myanmar, Nepal, St. Helena, Queensland, Samoa, Seychelles, Sri Lanka, Sulawesi, Sumatra, Trinidad, Victoria, and Vietnam, collected mainly from forest litter or caves.