地质学报（英文版）
地質學報（英文版）
지질학보（영문판）
ACTA GEOLOGICA SINICA
2008年
1期
27-34
,共8页
Octoradiate spiral organism%Eoandromeda octobrachiata%Ediacaran%South China
Shales of the Ediacaran Doushantuo Formation of South China contain a new disc-shaped macrofossil, Eoandromeda octobrachiata, characterized by eight spiral arms that were probably housed within an outer membrane. Although the presence of eight radiating structures entails a resemblance to cnidarian octocorais as well as to ctenophores, direct homologies with these extant groups are unlikely. Instead we bring attention to the helicospiral morphology of newly reported embryos from the Doushantuo Formation, suggesting that the long-sought adults of the Ediacaran embryonic metazoans have fmaily been found.
