Arthropoda, Family Acanthomeridiidae (Hou & Bergström,
1997), Genus Acanthomeridion erected (Hou, Chen & Lu, 1989)
Time: Lower Cambrian (~525 million years ago)
mm long on a 45 mm by 38 mm matrix
Site: Chengjiang Maotianshan Shales, Quiongzhusi Section, Yu'anshan
Member, Heilinpu Formation, Maotianshan Hill, Yuxi, Chengjiang County,
Yunnan Province, China
Acanthomeridion is an arthropod from the Maotianshan Shales that
is mainly recognized by a straight sided morphology.
They exhibit free cheeks like trilobites, but differ greatly
in overall appearance. Acanthomeridion is only known from
Biota, and is a monotypic one with this being the only species
within its family. This is an exceptionally rare fossil of
Xiang-Hong Feng, Xian-guang Hou (2008). The Cambrian Fossils of Chengjiang,
The Flowering of Early Animal Life. John Wiley & Sons. p. 176.
Also see: Chengjiang