Tetrablemma

Tetrablemma is a widespread genus of armored spiders first described by Octavius Pickard-Cambridge in 1873. It only has four eyes; an unusual trait for spiders, found only here and in some species of Caponiidae, though the two are not closely related. The eyes are large, but unequal in size, closely grouped around the center of the prosoma that rises in a somewhat of a cone shape from the abdomen. They have four closely positioned spinnerets enclosed in a corneous casing.

Species
, the World Spider Catalog accepted the following species:


 * Tetrablemma alaus Burger, Harvey & Stevens, 2010 – Australia (Western Australia)
 * Tetrablemma alterum Roewer, 1963 – Micronesia
 * Tetrablemma benoiti (Brignoli, 1978) – Seychelles
 * Tetrablemma brevidens Tong & Li, 2008 – China
 * Tetrablemma brignolii Lehtinen, 1981 – India
 * Tetrablemma deccanense (Tikader, 1976) – India
 * Tetrablemma extorre Shear, 1978 – Trinidad
 * Tetrablemma helenense Benoit, 1977 – St. Helena
 * Tetrablemma kepense Lin, Li & Jäger, 2018 – Cambodia
 * Tetrablemma loebli Bourne, 1980 – India
 * Tetrablemma magister Burger, 2008 – Australia (Queensland)
 * Tetrablemma manggarai Lehtinen, 1981 – Indonesia (Flores)
 * Tetrablemma marawula Lehtinen, 1981 – Indonesia (Sulawesi)
 * Tetrablemma mardionoi Lehtinen, 1981 – Indonesia (Sumatra)
 * Tetrablemma medioculatum O. Pickard-Cambridge, 1873 (type species) – Sri Lanka
 * Tetrablemma menglaense Lin & Li, 2014 – China
 * Tetrablemma namkhan Lin, Li & Jäger, 2012 – Laos
 * Tetrablemma nandan Lin & Li, 2010 – China
 * Tetrablemma okei Butler, 1932 – Australia (Victoria)
 * Tetrablemma phulchoki Lehtinen, 1981 – Nepal
 * Tetrablemma rhinoceros (Brignoli, 1974) – Angola
 * Tetrablemma samoense Marples, 1964 – Samoa
 * Tetrablemma sokense Lin, Li & Jäger, 2018 – Cambodia
 * Tetrablemma thamin Labarque & Grismado, 2009 – Myanmar
 * Tetrablemma viduum (Brignoli, 1974) – Angola
 * Tetrablemma vietnamense Lehtinen, 1981 – Vietnam
 * Tetrablemma ziyaoense Lin & Li, 2014 – China