Related how?

Biota (Life)
Eukaryote (Eukarya)
Diaphoretickes (Plants+hc+sar megagroup)
Archaeplastida
Plant (Green plants)

Psilophytopsida (20826015)

Children (2 direct children, 9 direct and indirect children):

Sciadophyton (tree size 1)

Psilophytales (tree size 6)