Mycologia
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DOI: 10.3852/mycologia.97.1.139
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Mycologia, 97(1), 2005, pp. 139-149.
© 2005 by The Mycological Society of America

The myxomycete genus Schenella: morphological and DNA sequence evidence for synonymy with the gasteromycete genus Pyrenogaster


Arturo Estrada-Torres

     Centro de Investigaciones en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Apdo. Postal 183. Tlaxcala 90000, México

Thomas W. Gaither

     Department of Biology, Slippery Rock University, Slippery Rock, Pennsylvania 16507-1325

Dennis L. Miller 1

     Department of Molecular and Cell Biology F03.1, University of Texas at Dallas, Richardson, Texas 75080

Carlos Lado

     Real Jardín Botánico, CSIC. Plaza de Murillo 2, 28014 Madrid, España

Harold W. Keller

     Department of Biology, Central Missouri State University, Warrensburg, Missouri 64093

The genus Schenella has proven difficult to classify since its description as a new genus in 1911. Macbride placed it with the Myxomycetes but it was unclear with which myxomycete, if any, it should be grouped. Recent identification of abundant samples of Schenella has aided a re-evaluation of its classification as a myxomycete. Morphological evidence based on light and scanning electron microscopy of recently collected specimens and on the type specimen of Macbride suggested that it might be synonymous with the gasteromycete Pyrenogaster. Analysis of DNA sequences from freshly isolated samples indicates that the genus Schenella is related closely to an anciently diverged, monophyletic group of fungi that includes several gasteromycete genera, among them Geastrum, Sphaerobolus and Pseudocolus. Comparisons of the morphology and DNA sequences of authentically identified specimens of Pyrenogaster atrogleba indicate that it is synonymous with Schenella simplex. The nomenclatural implications of this discovery are discussed.

Key words: Eumycetozoa, gasteromycete, molecular systematics, Myxomycetes, plasmodial slime molds, Pyrenogaster, Schenella






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Copyright © 2005 by The Mycological Society of America.