be a primitive simian based on its dental characteristics, including a lower dental formula of 2.1.3.3. Eosimias sinesis has incisors which are vertical and spatulate. These creatures are known primarily from lower jaws and teeth, no cranial remains have been able to indicate whether Eosimias was diurnal or nocturnal. Eosimias centennicus Eosimias centennicus was found in 1995 while doing fieldwork in the Yuanqu Basin of the southern Shanxi Province in China. Among these recovered fossils is the first complete lower dentition of Eosimias, catalogued as IVPP V11000. All anatomical information yielded from these fossils confirms the anthropoid-like traits found in E. sinensis. Biostratigraphic evidence also suggests these fossils are younger than E. sinensis, which is consistent with the anatomy of eosiimids because the dentition of E. centennicus is slightly more derived than that of E. sinensis. This species was also found to be a very tiny primate, with mean estimates of body mass ranging from . E. sinesis was originally described on the basis of fragmentary fossils, but with the discovery of E. centennicus and a complete lower dentition, Eosimias can more definitively be described as an early anthropoid. Eosimias dawsonae Eosimias dawsonae is the newest of the Eosimias species. It is categorized by the type specimen IVPP V11999, which includes a left dentary fragment and roots of the alveoli. It was collected by Christopher Beard in 1995. Analysis of these remains has led to the conclusion it was the largest of the known species of Eosimias, yielding a body mass ranging from . Stratigraphic evidence also shows E. dawsonae is older than E. centennicus. Unidentified fossils Additionally, an expedition team discovered evidence of a new, small eosimiid from Myanmar in 1999. The new specimen, represented by a right heel bone cataloged as NMMP 23, was found in wash residue in the Pondaung Formation. This specimen is very morphologically similar to the Eosimias discovered in the Shanghuang region of China. The best estimate for NMMP 23 includes an overall mean weight of about 111 grams, which places it in the upper-sized end of Eosimias fossils discovered. The presence of eosimiid in Myanmar, as well as a high species diversity found in China leads to an apparent conclusion that they had a relatively wide distribution. Eosimias paukkaungensis A new species of eosimiid primate, Eosimias paukkaungensis, from the latest middle Eocene of Pondaung, central Myanmar, was discovered in the early 2000s. The