a–i Tuber aztecorum (holotype ITCV 993). a; Two ascomata showing the peridial surface (bar = 1 cm) b Ascoma in cross-section showing peridial surface and glebal surface (bar = 1 cm) c Peridial surface magnified showing the verrucose surface (bar = 1 mm) d Clusters of erect hyphae emanating from the peridial surface (bar =10 µm) e A single surface hair-like hypha (bar = 10 µm) f Cystidium (bar = 10 µm) g Cross section of peridium showing pseudoparenchyma-like epicutis (bar = 20 µm) h Ascospores within asci in surface view showing the alveoli (bar = 20 µm) i Ascospore within asci in surface view showing the alveoli magnified (bar = 20 µm).