Table 2 A comparison of morphological characters of the genus Auxarthron, Auxarthronopsis, and Amauroascus.
Character | Auxarthron | Auxarthronopsis | Amauroascus | |
|---|---|---|---|---|
Ascomata | Colour | Yellow-brown to brown | White to pale cream | White, yellow or brown |
Size | <700 | 500–1000 | Up to 2.5 mm | |
Ascoma type | Reticuloperidium | Reticuloperidium | Incompositoperidium | |
Asci | Subglobose, globose or ovoid, 8-spored, evanescent, 7.2–8 × 10.6 µm | Globose, 8-spored, hyaline evanescent, 5 × 5.5 µm | Ovoid, 8-spored, up to 14 µm | |
Ascospore | Colour | Hyaline, to yellow or yellow-brown | Hyaline | Hyaline, yellow or reddish brown to dark brown |
Shape | spherical to oblate, minutely punctuate to punctate-reticulate | globose to subglobose, finely and regularly punctate, globose in polar view but oblate in equatorial view | spherical with pronounced irregular or regular puncta and ridges | |
Size | 1.75–2.5 × 2.75–3.2 | 3.5–7 µm | ||
Peridial hyphae | Reddish, rusty tan, enlarged at septa, thick cuticularized smooth to minutely to coarsely asperulate or tuberculate | Pale brown, branched and anastomosed form reticulate network, with swollen septa, sparsely asperulate | Usually undifferentiated in culture, occasionally pale brown, smooth & thick walled | |
Peridial appendages | Branches rare, tips round, sub-acute, larger appendages septate (1, 2 or 3 septa) with simple apices which are bent or slightly coiled or uncinate | Multiseptate with distinct swollen septa, tapering to acute hyaline apex indistinguishable from vegetative hyphae, upto 400 µm | Appendages lacking | |
Anamorph | Terminal, intercalary or rarely lateral, pyriform, oblong or cylindrical, aleurioconidia, arthroconidia, keratinolytic | Terminal or intercalary rhexolytically dehiscing arthroconidia and aleurioconidia, slightly keratinolytic | Terminal and/or intercalary rhexolytically dehiscing conidia, keratinolytic |