The 6.4 million-year-old fossils of the monkey species were discovered in the Shuitangba lignite mine in the northeastern Yunnan Province of China.
According to the China Earthquake Networks Center, the quake struck at 9.47 pm on Monday.
Zhenxiong County police defended the decision to use an old photograph because more recent ones were not available. The police has since apologized for the out-dated photo.
46 residents were believed to be buried under heap of rock after the landslide engulfed an entire village.
Rescuers recovered the last of the 18 students' remains early on Friday, about 18 hours after the landslide smothered the Tiantou Elementary School.
The death toll may rise further as rescuers are yet to reach some of the quake-hit villages blocked off by landslides.
The epicentre, was located at the border area between Ninglang and Yanyuan county of Sichuan at 27.7 degrees north latitude and 100.7 degrees east longitude.
250 people have been injured and condition of 134 of them are said to be serious