Fungi named in 1998

Chytridiomycetes is a class of fungi. Members are found in soil, fresh water, and saline estuaries. They are first known from the Rhynie chert. It has recently been redefined to exclude the taxa Neocallimastigomycota and Monoblepharidomycetes, which are now a phylum and a sister-class respectively. Chytridiomycetes is the major class of the phylum Chytridiomycota, which contains a number of parasitic species. At least two species in this class are known to infect a number of amphibian species.

Glomeromycota (often referred to as glomeromycetes, as they include only one class, Glomeromycetes) are one of eight currently recognized divisions within the kingdom Fungi, with approximately 230 described species. Members of the Glomeromycota form arbuscular mycorrhizas (AMs) with the thalli of bryophytes and the roots of vascular land plants. Not all species have been shown to form AMs, and one, Geosiphon pyriformis, is known not to do so. Instead, it forms an endocytobiotic association with Nostoc cyanobacteria. The majority of evidence shows that the Glomeromycota are dependent on land

Fusarium circinatum is a fungal plant pathogen that causes the serious disease pitch canker on pine trees and Douglas firs (Pseudotsuga menziesii). The most common hosts of the pathogen include slash pine (Pinus elliottii), loblolly pine (Pinus taeda), Monterey pine (Pinus radiata), Mexican weeping pine (Pinus patula), and Douglas fir. Like other Fusarium species in the phylum Ascomycota, it is the asexual reproductive state of the fungus and has a teleomorph, Gibberella circinata.

Lactarius fennoscandicus is a member of the large milk-cap genus Lactarius in the order Russulales. It is found in Scandinavia, where it grows in a mycorrhizal association with spruce trees.

Leratiomyces is a genus of mushroom-forming basidiomycetes first proposed three times under invalid names, and finally validated in 2008. It includes several formerly described, variously, from the genera Stropharia, Hypholoma, and Weraroa. It was formerly classified as Stropharia section Stropholoma, though some authorities placed this section in the genus Hypholoma, as these species often have features that are intermediate between the two genera. The genus name of Leratiomyces is in honour of Auguste Le Rat (1872-1910), who was a French teacher, and in 1904 was the curator of the Museums

Boletus separans is a species of bolete fungus in the family Boletaceae.

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The Annulatascaceae are a family of fungi in the monotypic order Annulatascales of the class Sordariomycetes of the Ascomycota. The family had not been assigned to any order, until 2020 when it was placed with a new order Annulatascales M.J. D'souza, Maharachch. & K.D. Hyde. Species in this family are saprobic, often found growing on rotten wood in freshwater habitats. They have a widespread distribution, with many found in tropical areas.

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Microascus brevicaulis is a microfungus in the Ascomycota. It is the teleomorph form of Scopulariopsis brevicaulis. Microascus brevicaulis occurs world-wide as a saprotroph in soil, a common agent of biodeterioration, an irregular plant pathogen, and an occasional agent of human nail infection.

Macrocybe is a genus of fungi in the family Callistosporiaceae. Basidiocarps (fruit bodies) are agarics (gilled mushrooms) and were previously referred to Tricholoma, but are all large, whitish, and saprotrophic (Tricholoma species are ectomycorrhizal). Recent molecular research, based on cladistic analysis of DNA sequences, has shown that the genus is a natural, monophyletic grouping, though the status of several species is uncertain. Macrocybe species have a tropical to subtropical distribution. The name is derived from the Ancient Greek words makros "long" and kube "head".

Morchella rufobrunnea, commonly known as the blushing morel, is a species of ascomycete fungus in the family Morchellaceae. A choice edible species, the fungus was described as new to science in 1998 by mycologists Gastón Guzmán and Fidel Tapia from collections made in Veracruz, Mexico. Its distribution was later revealed to be far more widespread after several DNA studies suggested that it is also present in the West Coast of the United States, Israel, Australia, Cyprus, Malta and Switzerland. M. rufobrunnea grows in disturbed soil or in woodchips used in landscaping as a saprotroph. Reports

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Amylostereum is the single genus in the fungal family Amylostereaceae. The genus currently comprises four saprotrophic and parasitic species, which live off living or dead wood. The Amylostereaceae cause white rot in the wood by disintegrating the tissue component lignin. They produce crust-like, partially wavy fruit bodies on the surface of infested trees, which are similar to those produced by Stereum species. There are four described species in the Amylostereaceae: A. chailletii (the type), A. areolatum, A. ferreum and A. laevigatum. The species were initially considered part of Stereum

The Melanotaeniaceae are a family of smut fungi in the order Ustilaginomycetes, containing three genera. It includes species such as smut fungus Melanotaenium cingens which was found parasitizing Linaria genistifolia (Plantaginaceae family) on Chornomorsky (Tendra Island, Kherson Oblast, Ukraine) in 2007.

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The Apiosporaceae are a family of fungi in the Ascomycota. It was placed in the order Amphisphaeriales in 2020. The family was circumscribed in 1998. Species in the family are saprobic, and derive nutrients by decomposing and digesting plant matter, especially palms and grasses. Anamorph genera include Arthrinium and Cordella.

Abundisporus is a small genus of poroid fungi currently with seven recognized species. They differ from other polypores in having coloured rather than hyaline spores.

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Rhytisma americanum is a species of ascomycete fungus in the family Rhytismataceae. It was described in 1998 by W. Hudler and M. Banik in the journal Mycotaxon. The species belongs to the genus Rhytisma, a group of tarspot fungi within the order Rhytismatales.

Parmotrema submarginale is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It was first formally described as a new species in 1803 by French botanist André Michaux, who called it Lobaria submarginalis. Paula DePriest and Beatrice Hale transferred it to the genus Parmotrema in 1998. It is found in Bolivia, Brazil, Costa Rica, Thailand, and the United States. Paragyalideopsis floridae is a lichenicolous fungus that has been documented infecting Parmotrema submarginale in Florida.

Parmotrema alidactylatum is a species of saxicolous lichen in the family Parmeliaceae. Found in Argentina, it was described as new to science in 1998. The holotype was collected in Cerro Colorado in northern Córdoba Province, where it was found growing on granite. The thallus of the lichen is foliose, with a grey colour, and measures up to 10 cm (4 in) across. The specific epithet alidactylatum refers to the presence of aliphatic acids in the medulla and the dactylate (referring to finger-like processes) upper surface. Parmotrema alidactylatum is similar in appearance and morphology to P.

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The Oliveoniaceae are a family of fungi in the order Auriculariales. Species form thin, effused, corticioid basidiocarps (fruit bodies) with aseptate basidia producing basidiospores that give rise to secondary spores. All species are believed to be saprotrophic, most growing on dead wood.