Lower-Cambrian (about 522 Ma) - Chengjiang, China
This is one of the earliest arthropods (from the time there was no life yet on land): Retifacies abnormalis It is the fossilized carapace of an extinct arthropod, see also the drawings of the reconstruction of the animal.
The fossil is convex (hollow) in the stone, so seems to be an imprint, but very well detailed. Yet I think it is the positive part "fossilised in a hollow form".
It had a soft shell, not a hard one like a trilobite.
From the Maotianshan Shales, a 522 million year old formation of rock in the Yunnan province of China - it contains fossilized soft tissue of various animals. These fossils are hard to come by at the time. This fossil has been collected before 2012.
Fossil Site: Maotianshan Shales of Chengjiang, Quiongzhusi Section, Yu’anshan Member, Heilinpu Formation, Mafang Village, Anning, Kunming, Yunnan, China
About 20 specimens have ever been found, all from this locality!
|Member since:||January 2, 2012|
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