What is this thing that is growing in my yard? And should I get rid ot if?
Myriostoma is a fungal genus in the family Geastraceae. The genus is monotypic, containing the single species Myriostoma coliforme. It is an earthstar, so named because the spore-bearing sac's outer wall splits open into the shape of a star. Source: Wikipedia.

But this recent article shows otherwise https://pdfs.semanticscholar.org/08ea/2ee6be93787f2e0034b85222b751a5281167.pdf