Summary:
Features include 1) resupinate growth on wood, 2) a soft and somewhat waxy fruitbody that becomes firmer and somewhat crustaceous, the color pale yellowish to pale ochraceous, the surface smooth becoming tuberculate to grandinioid with hemispheric papillae, and the margin indeterminate, in the periphery pruinose, 3) spores that are elliptic, smooth, and inamyloid, 4) cystidia of 2 types, both numerous: a) projecting, similar to hyphae, with a rounded head (normally resinous-encrusted) and rounded enlargements and constrictions along their lengths, and 0-several clamped septa, b) lagenocystidia each consisting of a hypha ending in a needle-like tip that is characteristically encrusted, and 5) monomitic hyphae that are richly branched and cyanophilic, with clamp connections.

Microscopic:
SPORES 4.5-5 x 3-3.5 microns, elliptic, smooth, inamyloid, thin-walled, mostly with 1 droplet at least in fresh material; BASIDIA 4-spored, 15-17 x 4-5 microns, at first subclavate then more or less cylindric, often sinuous, "with a slight or more often obvious, median, suburniform constriction", "walls cyanophilic, basally slightly thickened", basidia with basal clamp connection; CYSTIDIA of 2 types, both numerous, 1) mostly 50-80 x 5-7 microns (but sometimes larger), projecting, little differentiated from hyphae, with 0 to several clamped septa, somewhat thick-walled, "usually with an apical rounded head that is normally covered by a resinous encrustation", moreover with rounded enlargements and constrictions along their lengths, and 2) lagenocystidia, not or only slightly projecting, that "consist of hyphal ends, abruptly ending in a needle-like part, which apically is provided with a characteristic encrustation, in post-mature specimens, however, disappearing, in which case the lagenocystidia may be more difficult to observe"; both types of cystidia and especially the needle of the lagenocystidia cyanophilic; HYPHAE monomitic, richly branched, stainable in cotton-blue, with clamp connections at all septa, mostly 2-3 microns wide, the basal hyphae "distinct and somewhat thick-walled, yellowish", the subhymenial hyphae colorless, denser and thinner, (Eriksson), SPORES 5-6 x 4-4.5(5) microns, oval, smooth, inamyloid, colorless; BASIDIA 4-spored, 20-26 x 4.5-6 microns, narrowly clavate, with basal clamp connection; CYSTIDIA of 2 types: 1) septocystidia 60-90 x 3.5-5 microns, cylindric, hypha-like, rather thick-walled, often with 2-3 septa that have clamp connections, and 2) lagenocystidia subulate [awl-shaped] to ventricose, usually with encrusted tips, 20-35 x 2-3 microns; HYPHAE monomitic, 2-4 microns wide, +/- thick-walled, septa with clamp connections, (Breitenbach)

Notes:
Hyphodontia alutaria has been found in BC, AK, Costa Rica, Argentina, Austria, Germany, Sweden, Tanzania, Taiwan, and Thailand, (Langer), MB, AZ, CO, MI, MN, MT, NC, NM, TN, VA, and VT, (Ginns), Denmark and Finland, (Eriksson), and Switzerland (Breitenbach).

Synonyms and Alternate Names:
Peniophora alutaria Burt