Cephalopod Sinoceras chinense found outdoors China for the primary time

Cephalopod Sinoceras chinense discovered outside China for the first time

Sinoceras chinense is a type of extinct cephalopod mollusk that flourished within the late Ordovician. It’s considered the index fossil of the Higher Ordovician Pagoda Formation on the Yangtze Platform of South China, with a probable age of early Katian.

Cephalopod Sinoceras chinense discovered outside China for the first time
Sinoceras chinense, collected from Si Sawat county of Kanchanabura Province,
western Thaialand [Credit: NIGPAS]

S. chinense was beforehand solely identified from the Higher Ordovician of Chinese language blocks/terranes, together with South China, Tarim, Tibet and western Yunnan.

In January 2020, a Sino-Thai analysis crew led by Dr. Fang Xiang from the Nanjing Institute of Geology and Paleontology of the Chinese language Academy of Sciences (NIGPAS) and Prof. Clive Burrett from Mahasarakham College performed discipline analysis in western Thailand and picked up a lot of fossil specimens.

They found S. chinense within the Higher Ordovician strata, which is the primary discovery outdoors China. The research was revealed in Palaeoworld.

These specimens have been recorded in a geoconservation website named Nautiloid Web site, situated in western Thailand. Beforehand, these specimens have been wrongly recognized as actinocerids, resulting in miscalculation of the geological time of the higher a part of Tha Manao Formation.

Cephalopod Sinoceras chinense discovered outside China for the first time
Distribution of S. chinense within the northeastern peri-Gondwana area
[Credit: NIGPAS]

The precise identification of S. chinense steered that the age of the higher a part of Tha Manao Formation was the early Katian of Late Ordovician, offering proof for the stratigraphic correlation between the higher a part of the Tha Manao Formation in Thailand and the Pagoda Formation (and contemporaneous items) in China.

Western Thailand, mixed with Baoshan area of western Yunnan, was situated on Sibumasu Terrane through the Early Palaeozoic. The confirmed identification of S. chinense in Thailand is the primary report in Thailand and likewise the primary report in a area outdoors of China.

Furthermore, the invention of the species within the Sibumasu Terrane supplies robust help for the palaeogeographic reconstruction and pronounced palaeobiogeographic adjustments from the Center to Late Ordovician among the many peri-Gondwanan areas.

Writer: Li Yuan | Supply: Chinese language Academy of Sciences [July 30, 2020]

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