The Cardiodictyon is a genus of lobopodian known from 518 millions years old Chengjiang Lagerstätte also know as the Maotianshan Shales. These early Cambrian deposits are famous for their exceptional preservation of fossilized organisms as can be seen in this specimen.
Early Cambrian (518 mil y)
Chengjiang Lagerstätte, Yunnan, China
80 x 82 mm - 3.1" x 3.2"