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 Hypoxylon chathamense
BiostatusPresent in region - Indigenous. Endemic
Description: Stromata: Stromata pulvinate, or effused; 0.8 mm thick; perithecia not visible; ostioles lower than or more or less equal to stromatal surface; stromatal surface with distinct purple pigments (vinaceous or dark vinaceous); granules immediately below stromatal surface yellow brown; KOH-extractable pigments rust, deep yellow-brown to orange, or bright yellow; tissue below perithecia inconspicuous.
Perithecia: Perithecia more or less globose, or tubular; 0.3 mm diam.
Asci: Asci 90-215 µm long; 8-9 µm wide; stipe long with spores more or less confined to upper half of ascus; amyloid ring broader than high.
Ascospores: Ascospores 12-15 µm long; 6.5-8 µm wide; brown; 0-septate; in side view more or less equilateral, or inequilateral, flattened on one side, not curved; in face view elliptic; ends broadly rounded, or narrowly rounded. Germ slit straight, spore-length. Perispore dehiscent in 10% KOH; smooth or with indistinct transverse thickenings.
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