Hey dipterists
As I have collected a sample and made a profit with the Atylotus infos regarding this larva
I can add observation of the larva shedding its skin
The head part is easily moved backward, the most difficult part of the shedding was the fringed hairs terminal end
We can see the obvious difference between the fresh skin appearance and the old one's.
There are quite NO Calcium carbonate crystals on the skin
I have put this fresh dressed larva in the sample again. After a few hours, it was unrecognizable vs the others same larvae