Cranial bones very thick. Receding frontal bone. Strongly developed supraorbital torus. Small mastoid process. Broad nasal bone. Pronounced prognathism. Flat forehead. Massive body of mandible. Large upper incisor.
Several characters are similar. cranial capacity is within homosapiens range. Relative size of face is reduced. foramen Magnum similar to Homo sapiens. Dental arcade is parabolic. Post cranial anatomy is similar to Homo sapiens.
Evolve from homo habilis within a short span of time which is called punctuated equilibrium. 2 to 1.5 mya.