OBSERVATIONS ON THE GENUS PSAMMINA,INCLUDING THE DESCRIPTION OF TWO NEW ALGICOLOUS AND LICHENICOLOUS SPECIES |
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| Institution: | 1. Department of Geosciences and Geological and Petroleum Engineering, Missouri University of Science and Technology, Rolla, MO, USA;2. Smithsonian Tropical Research Institute, Panamá, Republic of Panama;3. Institut des Sciences de l''Evolution de Montpellier, Université de Montpellier, Montpellier, France;4. Department of Geology, University of Salamanca, Salamanca, Spain;1. Grupo Aragosaurus-IUCA, http://www.aragosaurus.com, Universidad de Zaragoza, E-50009 Zaragoza, Spain;2. CONICET-Museo Provincial de Ciencias Naturales “Profesor Dr. Juan A. Olsacher”, Zapala, 8340, Neuquén, Argentina;3. Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-526 Caparica, Portugal;4. Estratigrafía, Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain;5. CONICET-Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, General Roca, Río Negro, Argentina;6. Bayerische Staatssammlung für Paläontologie und Geologie and GeoBioCenter, Ludwig-Maximilians-Universität, Richard-Wagner-Str. 10, 80333 Munich, Germany |
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| Abstract: | Psammina inflata Earland-Bennett & D. Hawksw. and P. simplex Earland-Bennett & D. Hawksw. are described as new species from coccoid green algae and crustose or leprose lichens in lowland Britain. Additional records and hosts for P. stipitata are reported, and a key to the four species now known in the British Isles is presented. Psammina simplex is the more strongly pathogenic of the species, eventually destroying its hosts. The discovery of these new species adds weight to the view that the genus is more appropriately regarded as a hyphomycete rather than an acervular coelomycete. The size, shape and septation dimensions of the conidial arms were found to be the most reliable characters for species separations in the genus. Pycnopsammina lobariae Diederich & Etayo is also cited from the British Isles for the first time. |
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