From Ponce. (1968) (public domain):

Unexpanded basidiocarp large, subspherical, not pointed, entirely
buried until dehiscence; when open, 5-8 cm. wide; exoperidium split to
about the middle into 6-8 rays, the segments reflexed to form an arch;
the outer layer covered with earth or debris and tending to split away
in patches from the fibrous layer which is flesh colored when fresh;
fleshy layer very thick when fresh, up to 5 mm.; when dry, forming a
thinner crust with the appearance of rough leather; endoperidium up to
4 cm. thick, depressed globose, with a low apophysis around the lower
side; when fresh, flesh to greyish-flesh colored; when dry, brown to
grey brown, the surface covered with very minute, scurfy dots; mouth
slightly elevated, fibrous, fimbriated or toothed, indeterminate;
gleba light brown in mass, columella globose; spores globose, brown,
3.5-4um in diameter, minutely warted or asperulate; capillitium
threads simple, 3.5-4.8um thick, almost hyaline.