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 Add this item to the list  Wrightoporia tropicalis (Cke. ) Ryv.
   
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Page number:320 
Description:Wrightoporia tropicalis (Cke. ) Ryv.
LYAD 2143 G, Jules' Forest road, 27. IX. 76.
Descriptions of this species were given by Lowe (1966), Ryvarden (1982) and Ryvarden & Johansen (1980). The principal features of the species are: fruitbody resupinate and perennial, up to 1,5 cm thick, with indurated trama and dark greyish pore surface (but dark brown in the margin) ; dimitic hyphal system with simple septate generative hyphae and slightly dextrinoid skeletals; spores largely ellipsoid to subglobose, 3-4 x 2-3 µm, amyloid and finely asperulate; with incrusted cystidia and sulfo positive gloeocystidia.
Wrightoporia gloeocystidiata Johan. & Ryv. described from Kenya was place in synonymy with Poria tropicalis (Cke. ) Rick described from British Guiana- Ryvarden, 1983).
In the same work Ryvarden pointed out some differences between the American and the African collections: a) absence of gloeocystidia in the American material; b) difficulty in finding clamps in the African collection whereas clamps were easier to find in the American specimens.
Our collection was compared with one from Ryvarden's herbarium (Kenya n° 9787) and another from NY (Venezuelan Expedition 1950-51 n° 29375, Amazonas, Rio Orinoco, Rio Cunucunuma, Playa Alta, 100 mts, leg. B. Maguire, R. S. Cowan and J. J. Wurdack 3. XI. 50). From this study we can conclude that: a) All the collections have sulfo-positive gloeocystidia; b) American collections differ in having abundant spheroid masses of crystals 15-20 µm diam. After dilution in acid the crystals were concentrically arranged around an amorphous substance which is itself disposed on the sharpened extremity of skeletal hyphae (fig. 28). These cystidia, already cited by Lowe were not seen in the African collection and distinctly separate South American and African materials; c) No clamps were found in any collection in spite of a persistent search
Wrightoporia tropicalis seems quite different from other members of the genus because of its massive habit and the absence of clamps. We want to emphasize that the assemblage of highly specialized characters (ornamented amyloid spores plus sulfo positive gloeocystidia) is also found in other genera and families of very different Hymenomycetes (Gluschoff-Fiasson et al., 1983).
 
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