The hydnoid fungi are a group of fungi in the Basidiomycota with basidiocarps producing spores on pendant, tooth-like or spine-like projections. They are colloquially called tooth fungi. Originally such fungi were referred to the genus Hydnum, but it is now known that not all hydnoid species are closely related.
Mycena lanuginosa is a species of mushroom in the family Mycenaceae. First collected in 2000 and reported as a new species in 2007, it is known only from lowland oak-dominated forests in central Honshu in Japan. The small mushroom is characterized by its grooved, grayish-brown to violet-brown cap up to 11 mm (0.43 in) in diameter, and the slender grayish-brown to reddish-brown stem covered with minute, fine, soft hairs. The mushroom produces amyloid spores. Microscopic distinguishing features include the smooth, spindle-shaped cheilocystidia and pleurocystidia and the diverticulate elements in the outer layer of the cap and the stem.
Auriscalpium barbatum is a species of spine fungus in the family Auriscalpiaceae of the Russulales order. Found in Western Australia in 1977 embedded on fragments of humus in sandy soil, it was described as new to science by the Dutch mycologist Rudolph Arnold Maas Geesteranus in 1978.
Hydnellum fuscoindicum, commonly known as the violet hedgehog, is a species of tooth fungus in the genus Hydnellum. It is found in the Pacific Northwest in moss around western hemlocks. It produces fruit bodies with a violet-black cap, violet flesh, and violet spines on the cap underside. The odor and taste are very farinaceous. The fungus was first described by Kenneth A. Harrison in 1964 as a species of Hydnum, then transferred to Sarcodon in 1967 by Rudolph Arnold Maas Geesteranus. He placed this species in section Violacei of Sarcodon, along with H. fuligineoviolaceum and H. joeides.
Hydnellum auratile is a tooth fungus in the family Bankeraceae. Fruit bodies of the fungus consist of closely grouped, funnel-shaped caps up to 5 cm (2.0 in) in diameter. The caps are initially bright orange with a white rim, and have a felt-like surface. On the cap underside, the hymenium has hanging orange spines with whitish tips. These spines extend a ways down the length of the short stipe. The flesh is orange in both the cap and stipe. In mass, the spores are brown. Microscopically, they measure 4–5 by 3.5–4.5 µm and have short, rounded tubercles on the surface. The widespread Hydnellum aurantiacum is a close lookalike, but can be distinguished by having a white to buff cap, dull orange to brown flesh, and white spines.
Hydnellum glaucopus is a species of tooth fungus in the family Bankeraceae. Found in Europe, it was described as new to science in 1969 by mycologists Rudolph Arnold Maas Geesteranus and John Axel Nannfeldt. Fruit bodies contain cyathane diterpenes called glaucopins that have anti-inflammatory activity in laboratory tests. It is considered vulnerable in Switzerland.
Hydnellum lundellii is a species of tooth fungus in the family Bankeraceae. Found in Europe, it was described as new to science in 1969 by mycologists Rudolph Arnold Maas Geesteranus and John Axel Nannfeldt.
Sarcodon caliginosus is a species of tooth fungus in the family Bankeraceae. Found in Papua New Guinea, it was described as new to science in 1974 by Dutch mycologist Rudolph Arnold Maas Geesteranus. Its fruit bodies have dark grey-brown caps with reddish tinges and brownish-pink coloration at the margins.
Sarcodon conchyliatus is a species of tooth fungus in the family Bankeraceae. Found in Malaysia, it was described as new to science in 1971 by Dutch mycologist Rudolph Arnold Maas Geesteranus. The fruit bodies have finely tomentose caps that are dull ochraceous, greyish or brownish, and typically have drab to purplish tinges. The spines on the cap underside are not decurrent on the stipe. Maas Geesteranus placed the fungus in the section Virescentes, along with S. atroviridis and S. thwaitesii, all species with flesh that dries to a deep olive green color.
Sarcodon bubalinus is a European species of tooth fungus in the family Bankeraceae. First described by Christian Hendrik Persoon in 1825 as Hydnum bubalinum, it was transferred to the genus Sarcodon by Rudolph Arnold Maas Geesteranus in 1956.
Sarcodon regalis is a rare species of tooth fungus in the family Bankeraceae. It was described as new to science in 1975 by Dutch mycologist Rudolph Arnold Maas Geesteranus. It is found in Europe, where it usually associates with oak and sweet chestnut; pine has been reported as another associate. Fruit bodies have yellowish-brown, convex to flattened caps up to 10 cm (3.9 in) in diameter. The surface features adpressed scales that are broadest in the centre, narrowing toward the margin. The spines on the cap underside are 1.5–3 mm long; initially pale, they become brown to purplish brown after the spores mature. The spores are roughly spherical, measuring 5–6.5 by 4–5 μm.
Hydnellum martioflavum is a species of tooth fungus in the family Bankeraceae, found in Europe and North America.
Sarcodon rutilus is a species of tooth fungus in the family Bankeraceae. Found in Papua New Guinea, it was described as new to science in 1974 by Dutch mycologist Rudolph Arnold Maas Geesteranus. The specific epithet rutilus refers to the red cap.
Sarcodon wrightii is a species of tooth fungus in the family Bankeraceae. It was first described in 1860 by Miles Berkeley and Moses Ashley Curtis as Hydnum wrightii. They were sent a specimen collected from Japan as part of the North Pacific Exploring and Surveying Expedition (1853–56). Rudolph Arnold Maas Geesteranus transferred it to the genus Sarcodon in 1967. The fungus produces roughly spherical spores that are tuberculate and measure 5.5–6.5 by 4.5–5.5 μm.
Hydnellum joeides is a species of tooth fungus in the family Bankeraceae.
Sarcodon thwaitesii is a species of tooth fungus in the family Bankeraceae. It is found in Asia, Europe, and New Zealand, where it fruits on the ground in mixed forest.
Sarcodon cyrneus is a species of tooth fungus in the family Bankeraceae. Found in Europe, it was described as new to science in 1975 by Dutch mycologist Rudolph Arnold Maas Geesteranus. The specific epithet cyrneus is derived from the Latin "Corsican", referring to Corsica, the type locality. Fruit bodies contains neurotrophic cyathane diterpene compounds called cyrneines.
Metuloidea murashkinskyi is a species of tooth fungus in the family Steccherinaceae. It is found in Europe and Asia, where it causes a white rot on the wood of deciduous trees.
Mycorrhaphium pusillum is a species of tooth fungus in the family Steccherinaceae. It is a rare European fungus that has only been officially recorded a few times.
Climacodon sanguineus is a rare species of tooth fungus in the family Meruliaceae that is found in Africa.
