Cardiodictyon is a genus of lobopodian known from 518 millions years old Chengjiang Lagerstätte.

525 millions years old partial fossil is also reported.

Each leg terminates in a pair of claws.

[4] In 2022, a 518 million years old specimen of C. catenulum was researched and shown an unsegmented head and a brain composed of three separate cephalic parts.

[1] However, although "three parts" in this study means prosocerebrum, protocerebrum and deutocerebrum,[1] it is different from earlier studies that referred protocerebrum, deutocerebrum and tritocerebrum as tripartite brain of arthropod, and treated posocerebrum as part of protocerebrum.