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Two Exotic Corticolous Lichens: Pyxine meissnerina and Endocarpon cf albidulum

by: Prof. Isidro T. Savillo

Savillo, I. 2004 at  http://www.geocities.com/articles_lichens2/index.htm or at http://www.biologybrowser.org/bb/Organism/Plantae/Lichenes

    A sample was given by a former microbiology student from New Washington, Aklan and surprisingly it turned out to be Pyxine meissnerina  (Swinscow and Krog, 1988). Another unexpected event, was the growth of Endocarpon cf albidulum (Swinscow and Krog, 1988), on the trunk of Swietenia macrophylla in a family lot at San Joaquin, Iloilo. When I saw the whitish squamules, I took bits of it for examination. The Endocarpon is in itself excellent in camouflaging. When I visited that place again, there were no whitish squamules but instead a piece of brownish to blackish woolly type (felt-like) of substrate was all that's left. When will the whitish squamules appear again? This is worth re-visiting.


Endocarpon cf albidulum (Muell. Arg.) Zahr.


   Thallus squamulose, whitish grey, cortex present, irregularly spreading, imbricate, orbicular to elongate with round and slightly downcurved apices, underside concolorous with rhizines, perithecia with brown exciple, hymenial alga globose, spores muriform, two per ascus, 27.5-30 X 12.5 um in size.


Pyxine meissnerina Nyl


   Thallus yellowish white, about 1.7 cm across, adglutinated pruina in plaques extensively on lobes, lobe margins 0.1 cm, medulla yellow, soralia and soredia white to pale yellow, pseudocyphellae minimally present in lobe margins and laminal surface, soralia marginal to submarginal, orbicular to linear.

Reference:

   Swinscow, T.D.V. and H. Krog. 1988. Macrolichens of East Africa. British Museum (Natural History) London


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