Gary Joseph Samuels

The Bionectriaceae are a family of fungi in the order Hypocreales. A 2008 estimate places 35 genera and 281 species in the family. Species in the family tend to grow on plant material, including woody debris, while some species associate with algae, bryophytes, or other fungi.

Clonostachys rosea f. rosea, also known as Gliocladium roseum and commonly called the rose bracket, is a species of fungus in the family Bionectriaceae. It colonizes living plants as an endophyte, digests material in soil as a saprophyte and is also known as a parasite of other fungi and of nematodes. It produces a wide range of volatile organic compounds which are toxic to organisms including other fungi, bacteria, and insects, and is of interest as a biological pest control agent.

Neonectria ditissima (syn. Neonectria galligena) is a fungal plant pathogen. It causes cankers that can kill branches of trees by choking them off. Apple and beech trees are two susceptible species.

The Chaetosphaeriaceae are a family of fungi in the Ascomycota, class Sordariomycetes. The family was circumscribed by Martina Réblová, Margaret Elizabeth Barr Bigelow, and Gary Samuels in 1999. Species in the family have a cosmopolitan distribution, and are found in both temperate and tropical climates. Fossils of the Chaetosphaeriaceae are known from the Carboniferous, Eocene, Oligocene, Miocene and more recent sediments.

The Helminthosphaeriaceae are a family of fungi in the class Sordariomycetes. Species in this family are saprobic, often growing on rotten wood or on the fruit bodies of old mushrooms. They are distributed in temperate areas.

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Albonectria rigidiuscula is a fungal plant pathogen. The anamorph of A. rigidiuscula the fungus Fusarium decemcellulare is associated with inflorescence wilt and vascular necrosis in fruit tree crops such as Mango (Mangifera indica), Longan (Dimocarpus longan) and Rambutan (Nephelium lappaceum). F. decemcellulare causes a disease known as cushion gall in Theobroma cacao and other tropical trees.

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Hypomyces papulasporae is a parasitic ascomycete in the order Hypocreales. It was described as new to science in 1985. The type collection, made in New Zealand, was found growing on the ascomata of Trichoglossum hirsutum (black earth tongues). H. papulasporae has Sibirina- and Papulaspora-like synanamorphs.

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Bionectria ochroleuca is a plant pathogen that causes seed rot in oil seed rape.

The Batistiaceae are a family of fungi in the division Ascomycota. The family was described by Gary Samuels and Katia Rodrigues in 1989 to contain the genus Batistia and its sole species Batistia annulipes. The anarph form of this fungus has been named Acrostroma annellosynnema. Batistia annulipes was originally described from French Guiana, and was later found in other locations in South America and in Panama.

Trichoderma stromaticum is a species of fungus in the family Hypocreaceae. It is a parasite of the cacao witches broom pathogen and has been used in its biological control.

Trichoderma asperellum Samuels, Lieckf & Nirenberg is a species of fungus in the family Hypocreaceae. It can be distinguished from T. viride by molecular and phenotypic characteristics. The most important molecular characteristics are divergent ITS-1 and 28S sequences and RFLP's of the endochitinase gene. Main phenotypic characters are conidial ornamentation and arrangement and branching of the conidiophores.

Striatosphaeria is a genus of fungi within the Chaetosphaeriaceae family. This is a monotypic genus, containing the single species Striatosphaeria codinaeaphora.

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Holmiella is a genus of fungi in the order Patellariales. The genus name of Holmiella is in honour of Kerstin Holm (b.1924), a Swedish botanist (Mycology) who was married to architect Lennart Holm (1921 - 2012) and worked at Uppsala University. The genus was circumscribed by Orlando Petrini, Gary Joseph Samuels and Emil Müller in Ber. Schweiz. Bot. Ges. vol.89 on page 83 in 1979. According to the GBIF it has 6 species; Holmiella domackae Holmiella juniperi-semiglobosae Pem, Gafforov, Jeewon & K.D.Hyde Holmiella junipericola Pem, Gafforov, Jeewon & K.D.Hyde Holmiella macrospora (Bonar &

Botryohypoxylon is a genus of fungi in the class Dothideomycetes. The relationship of this taxon to other taxa within the class is unknown (incertae sedis). A monotypic genus, it contains the single species Botryohypoxylon amazonense.

Albonectria is a genus of ascomycete fungi in the family Nectriaceae.

Trichoderma ovalisporum is a species of fungus. It has ovoidal conidia and a fast rate of growth at 30 °C. It has been considered for its biocontrol potential against Moniliophthora roreri.

Stephanonectria is a genus of fungi in the class Sordariomycetes. This was a monotypic genus, containing the single species Stephanonectria keithii until another species was added in 2023.

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Phragmogibbera is a genus of fungi in the family Venturiaceae.

Obtectodiscus is a genus of fungi in the family Dermateaceae. The genus contains two species.

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Nectriella pironii is a plant pathogen. It parasitizes Aphelandra squarrosa, Clerodendron bungei, Codiaeum variegatum, Jussiaea peruviana, Leucophyllum frutescens, Pittosporum tobria, Plumbago capensis, Chrysanthemum morifolium and Psychotria undata. The species is named in honor of Pascal Pompey Pirone.

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