Summary:
Also listed in Crusts category. Features include 1) resupinate growth on wood, especially hardwood, 2) a fruitbody that is white to yellowish, with a maze-like toothed surface or sometimes poroid, 3) spores that are elliptic, smooth, inamyloid, and colorless, 4) cystidia when present originating in the hymenium, capitate, with a rounded exudate (but hyphal ends from the outer edges of the pores are obtuse not capitate) and 5) a hyphal system that is either dimitic (Hallenberg) or pseudodimitic (Langer), the hyphae with clamp connections. Schizopora radula was separated from Schizopora paradoxa in 1983, and previous descriptions of Schizopora paradoxa refer to both species; Langer(1) and Hallenberg(5) separate them slightly differently, see SIMILAR. With respect to Schizopora radula and Schizopora paradoxa, "Usually there are no problems in distinguishing the two species just by a look at the hymenophore (25 X) - at least for C. and N. European specimens. However, there are also specimens which are difficult to interpret, especially among perennial ones or when the fruitbody has grown on a vertical substrate. In these cases the microstructure is distinctive.", (Hallenberg)

Microscopic:
spores 5-5.5 x 3.3-4 microns, when measured from spore prints, elliptic; cystidia capitate, rare; hyphae dimitic: "skeletals very thick-walled with a narrow lumen, not branched", acyanophilic, generally abundant (the presence of skeletal hyphae most easily observed in the byssoid margins of the fruitbody or in the trama); generative hyphae with clamp connections, more or less thick-walled; incrustation of hyphae in the pore mouth variable, often absent, (Hallenberg), spores 5.5-6.5 x 3.5-4.5 microns, elliptic, smooth, inamyloid, colorless, thin-walled; basidia 4-spored, 17-21 x 4-5 microns, suburniform; cystidia capitate, about 30 microns long, 4-6 microns wide, (with a rounded, apical, colorless exudate), originating in the hymenium; hyphal ends on the edges of the pores are obtuse, not capitate, hyphae pseudodimitic, (Langer), spores 5-6.5 x 3-4 microns, broadly elliptic, smooth, inamyloid; cystidia-like structures clavate, spindle-shaped or broadly swollen, not projecting, (Buczacki)

Spore Deposit:
white (Buczacki)

Notes:
Schizopora paradoxa has been found in WA, AK, TN, Brazil, Columbia, Germany, Italy, Norway, Romania, Spain, Sweden, United Kingdom, Iran, Taiwan, and Australia, (Langer), BC, Denmark, Norway, and Sweden, (Hallenberg), LA (Gilbertson(4)), and CA (Desjardin(6)).

Synonyms and Alternate Names:
Helotium nebulophilum Redhead
Hydnum erinaceus Bull.