アメリカ自然史博物館のインスタグラム(amnh) - 7月12日 06時59分

It's time for Trilobite Tuesday! In 1984, a thousand years after these layers were first noted by local residents, Chinese scientists formally described an amazing 515 million year old Lower Cambrian fauna located within the Maotianshan Shales of Chengjiang County in China's southern province of Yunnan. There, mixed amid a variety of primitive trilobite species including Eoredlichia intermedia (photo), Yunnanocephalus yunnanensis, Wutingaspis tingi and Kauyangi pustulosa, were an astounding assortment of soft-bodied creatures, many of which resembled those found in the legendary-- though 5 million years more recent-- Burgess Shale of British Columbia. Material from the Chinese site (which along with a number of other similarly-aged local layers, including the Chiungchussu and Qionzhusi formations, have become collectively recognized as the Chengjiang Biota) had been known as early as the 10th Century.
It wasn't until scientific expeditions began exploring the area in late 1970s, however, that research began to unravel the myriad scientific mysteries that lay within these 50-meter thick, hard mudstone layers. So far, 185 different species (with over half being arthropods… four being the aforementioned trilobites) have revealed themselves in the Chengjiang Biota, with the possibility that even more are still hidden within these ancient rocks, waiting to be discovered. #Trilobite #trilobites #trilobitetuesday #trilobitetuesdays #amnh #naturalhistory #fossil #fossils

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