First off, we have not yet agreed to move slit like pored puffballs into Handkea here in California. So, This is still Calvatia subcretaceae.
Notes on this particular collection
Spores:
globose to subglobose, roughened to smooth, yes pedicel up to 7 um yet mostly only up to 2um and broken, no sterigma in water mounts, yes oil drop, spores golden brown in water mounts, no visible casing in KOH, spores roughly 4.5(5)-4(5)um in size (LxW)

Capillitium:
Kreisel’s Handkea type. Some very large thick branches, up to 15-16 um accross with walls up to 1.5um, encrusted, very dark chocolate brown. Appearing to have a centralized main stem with y-branching and uneven sinuous inner walls (not smooth). Larger threads tend to have more slits per um squared. Tips broken, some tips rounded at the end, blunt, not finely pointed or attenuate. hyphae mostly straight.
Smaller capillitia threads less pigmented (up to 5.5 um thick and walls 1/2 um thick), lighter golden brown that matches the spore pigmentation. Septa present, not common. Paracap present.
Slits, pits not round, either star-shaped, y-shaped or long linear shaped.
Lots of hyaline non descript cellular material present.

(we need spell checker here)