would not have been particularly deep (it would have been weaker). This may have produced a less effective bite compared to P. boisei. KNM-WT 16005 is quite similar to the Peninj Mandible assigned to P. boisei, exhibiting postcanine megadontia with relatively small incisors and canines (based on the tooth roots) and large cheek teeth. Nonetheless, the incisors were likely much broader in KNM-WT 16005. KNM-WT 16005 preserved four cheek teeth on the left side: the third premolar measuring , the fourth premolar measuring , the first molar measuring , and the second molar measuring . The fourth premolar and first molar are a little smaller than those of the Peninj mandible, and the second molar a bit bigger. The KNM-WT 16005 jawbone is smaller than what KNM WT 17000 would have had. Many of these P. aethiopicus features are shared with the early A. afarensis, further reiterating the species' archaicness. Palaeoecology In general, Paranthropus are thought to have been generalist feeders, with the heavily built skull becoming important when chewing less desirable, lower quality foods in times of famine. Unlike P. boisei which generally is found in the context of closed, wet environments, P. aethiopicus seems to have inhabited bushland to open woodland habitats around edaphic (water-logged) grasslands. Around 2.5 million years ago, at the Pliocene/Pleistocene border, the Omo–Turkana Basin featured a mix of forests, woodlands, grasslands, and bushlands, though grasslands appear to have been expanding through the Early Pleistocene. Homo seems to have entered the region 2.5–2.4 million years ago. See also References External links Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016). Paranthropus Pliocene primates Fossil taxa described in 1968 Prehistoric Kenya Pleistocene mammals of Africa