Tuber pseudoexcavatum

Tuber pseudoexcavatum Wang, G. Moreno, L. J. Riousset, Manjon & G. Riousset in Cryptogamie, Mycol. 19 (1-2):113-120.

Ascocarp Morphology. Ascocarp subglobose, orifice or cavity present, 3.5 cm in diameter, orange or brown, with warts, warts flat, color of spore-bearing tissue grey or brown, veins large and rare. Peridium 290-500 micron, outermost layers 190-350 micron, red-brown, anatomical structure pseudoparenchimatic with roundish cells, cell tangential dimension 10-20 micron, cell radial dimension 10-20 micron, innermost layers 100-140 micron, color hyaline, anatomical structure plectenchymatic, cell tangential dimension 3-9 micron, external cystidia absent. Sterile veins plectenchimatic.

Asci ans spores Morphology. Asci globose, major axis 60-85(-105) micron, minor axis 45-70 micron, number of spores per ascus 1-8, irregularly clustered.

Spores ellipsoid, major axis (23-)24-28(-35) micrometer lenght, minor axis 16-19(-22) micrometer lenght, color dark brown, spines or reticulation; ornamentation length 5-8 micron.

Distribution. Putative plant host Pinus.


Images:
Tuber pseudoexcavatum.jpg
Tuber pseudoexcavatum ascocarp.jpg
Tuber pseudoexcavatum spores.jpg

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