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Page number:31 
Remarks (internal):The type collection was originally cited under Hydnellum carbunculus (Secr.) Banker (Banker, 1906). At a later date, Banker determined that the collection represented a new species and not the same taxon as described by Secretan (1833). In the original description, Banker described the spores of this species as 4.0-5.5 µm wide, ovoid, and tuberculate. Maas Geesteranus (1969) listed this species as a synonym of Hydnellum peckii. Contrary to his finding, Snell et al. (1956), Harrison (1968), and Baird (1984) were able to easily separate the two species.
Description type:Non-original description 
Description:Hydnellum diabolus Banker. 1913. Mycologia 5:194.
Type specimen (Holotype): [NY]USA: Maine, Mt. Desert. Autumn, White no. 148. [!]
Macromorphology (preserved, mihi): Sporophore: pileus up to 6.0 cm broad, convex to plane' or slightly depressed, subvelutinous to spongy tomentose, matted or glabrous, subcolliculose to scrobiculate at disc, pitted from collapsing tomentum, white (6AI), clay (6D5), dark brown (7F8) or blackish brown in matted or glabrous areas; margin thick blunt, uneven; context not duplex' slightly zonate, white (6AI), orange white (6A2) to flesh (6B3); taste acrid; odor of nuts. Stipe: 4.0 x 2.2 cm, central, fused, terete, attenuate downward to a blunt or bulbous base, tomentose, matted to glabrous, concolorous with pileus; context duplex, zonate mainly towards base, concolorous with pileus flesh. Spines: up to 4.0 mm long, decurrent, white (6AI), clay (6D5) to dark brown (7F8) or black. Chemical reactions: preserved context dark olive green to black in KOH or NH4OH. Micromorphology (preserved, mihi): Pileus trama hyphae: up to 6.5 µm diam., uninflated, interwoven in subsurface layer, parallel below, clamped; gloeoplerous-like hyphae present. Stipe hyphae: up to 6.5 µm diam., uninflated, interwoven in subsurface layer, parallel in central layer, clamped; gloeoplerous-like hyphae present. Spine trama hyphae: up to 4.0 µm diam., unclamped. Basidia: (n=20) 28.0-37.0 x (5.5) 6.0-6.5 µm (X= 29.40 " 4.16 x 6.25 " 0.34 µm), clavate, unclamped, 4-spored; sterigmata (n=10) (3.0) 3.5-4.8 µm (X= 3.95 " 0.56 µm). Basidiospores: (n=20) (4.4) 4.7-5.6 x 4.0-4.9 µm (X= 5.08 " 0.34 x 4.34 " 0.34 µm), subglobose, brownish; ornamentation tuberculate, short, exsculpate; hilar appendage oblique.