A monograph of the genera Nectriella Nitschke and Pronectria Clements with reference to Charonectria, Cryptonectriella, Hydronectria and Pseudonectria.
Item
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Title
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A monograph of the genera Nectriella Nitschke and Pronectria Clements with reference to Charonectria, Cryptonectriella, Hydronectria and Pseudonectria.
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Identifier
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AAI9207099
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identifier
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9207099
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Creator
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Lowen, Rosalind.
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Contributor
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Adviser: Clark T. Rogerson
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Date
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1991
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Language
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English
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Publisher
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City University of New York.
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Subject
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Biology, Botany | Biology, Microbiology
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Abstract
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A monographic revision of the genus Nectriella Nitschke in Fuckel (1870) (non Nectriella Saccardo, 1877); Ascomycetes, Hypocreales, Hypocreaceae is presented. Nectriella Nitschke, typified by N. fuckelii Nitschke is characterized by nonstromatic, often setose ascomata that are immersed to partially erumpent. The ascomata usually occur in dead plant tissue. The asci generally have a nonamyloid ring. The ascospores are typically uniseptate, usually ornamented and partly biseriate. As in the other hypocrealean genera, the known anamorphs are phialidic.;Lichenicolous taxa formerly included in Nectriella have been placed in the genus Pronectria Clements (1931), type species P. robergei (Mont. & Desm.) Clements. Ascomata of species of Pronectria typically remain immersed, are parasitic and have a clypeoid mixture of fungus and host tissues. They generally have redder pigments than those of Nectriella.;Twenty-five species are included in Nectriella Nitschke and 17 species in Pronectria. These species, their known anamorphs and relationships are discussed. New taxa described here are Charonectria amabilis Lowen & Hawksworth, Nectriella dingleyae Lowen, N. minuta Lowen, N. obscura Lowen, N. rubrocapitula Lowen, N. utahensis Lowen & Rogerson, Pronectria echinulata Lowen, P. leptaleae (Steiner) Lowen var. tuberculata Lowen, P. paucispora Lowen, and P. pertusariicola Lowen. Two new names proposed are Nectriella crouanii Lowen and N. halonata Lowen. New combinations in the Hypocreales are Nectria helenae (Sacc. & Roum.) Lowen, Nectriella dakotensis (Seaver) Lowen, Pseudonectria aurantia (Penzig & Sacc.) Lowen and Pseudonectria coronata (Juel) Lowen. New combinations in the Xylariales are Charonectria sceptri (Nyl.) Lowen, Cryptonectriella geoglossi (Overeem) Lowen and Discostroma succinea (Roberge) Lowen.;Most of the names excluded from Nectriella Nitschke belong in the hypocrealean genera Nectria sensu lato, Hydronectria and Schizoparme. The remaining excluded species are placed in nonhypocrealean genera, such as Charonectria and Cryptonectriella.;A later homonym, Nectriella Saccardo (= Pseudonectria Seaver), was erected for species with superficial ascomata and unicellular ascospores. Nomenclature and brief descriptions of examined specimens are presented for the species originally referred to Nectriella Saccardo.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
