Both males and females of Diores simplicior have a total length of 3.78 mm. The carapace and chelicerae are yellowish-orange, with the carapace being suffused with black in the eye region and on the clypeus. There is a broad dark patch in front of the fovea with four striae radiating forwards. The sternum is pale yellow. The opisthosoma is dark sepia with a median row of pale blotches, with the posterior ones anastomosing to form a broad line in front of the spinnerets. The inferior part of the sides and venter are pale, except for a dark W-shape in front of the spinnerets.
Ecology
Diores simplicior are free-living ground-dwellers that construct igloo-shaped retreats with small stones, characteristic behavior of the genus Diores.